chore: add human friendly descriptions to `exec`, `run_sh` and `run_python` instructions (#561)

Add human friendly descriptions when executing commands or running
scripts.

Here is an example:

Without descriptions.

```bash
Executing command on service 'validator-key-generation-cl-validator-keystore'
Command returned with exit code '0' with no output

Verifying whether two values meet a certain condition '=='
Verification succeeded. Value is '0'.

Storing files from service 'validator-key-generation-cl-validator-keystore' at path '/node-0-keystores' to files artifact with name '1-lighthouse-geth-0-63'
Files with artifact name '1-lighthouse-geth-0-63' uploaded with artifact UUID 'd42fe1052c85433580a752bf818a54f1'

Executing command on service 'validator-key-generation-cl-validator-keystore'
Command returned with exit code '0' with no output
```

With descriptions.

```bash
Generating keystores
Command returned with exit code '0' with no output

Verifying whether two values meet a certain condition '=='
Verification succeeded. Value is '0'.

Storing files from service 'validator-key-generation-cl-validator-keystore' at path '/node-0-keystores' to files artifact with name '1-lighthouse-geth-0-63'
Files with artifact name '1-lighthouse-geth-0-63' uploaded with artifact UUID '51cfc3d4fd01469ca5512628098ab87f'

Storing prysm password in a file
Command returned with exit code '0' with no output
```
Co-authored-by: Barnabas Busa <busa.barnabas@gmail.com>

src/full_beaconchain/full_beaconchain_launcher.star

@@ -195,6 +195,7 @@ def launch_full_beacon(
     plan.print("applying db schema")
     plan.exec(
         service_name=initdbschema.name,
+        description="Applying db schema",
         recipe=ExecRecipe(
             [
                 "./misc",
@@ -210,6 +211,7 @@ def launch_full_beacon(
     # Initialize the bigtable schema
     plan.exec(
         service_name=initdbschema.name,
+        description="Applying big table schema",
         recipe=ExecRecipe(
             [
                 "./misc",

src/grafana/grafana_launcher.star

@@ -202,6 +202,7 @@ def merge_dashboards_artifacts(
         ] = additional_dashboard_data[GRANAFA_ADDITIONAL_DASHBOARDS_ARTIFACT_NAME_KEY]
 
     result = plan.run_sh(
+        description="Merging grafana dashboards artifacts",
         run="find "
         + GRAFANA_ADDITIONAL_DASHBOARDS_FILEPATH_ON_SERVICE
         + " -type f -exec cp {} "

src/mev/mev_custom_flood/mev_custom_flood_launcher.star

@@ -39,6 +39,7 @@ def spam_in_background(
 
     plan.exec(
         service_name=CUSTOM_FLOOD_SERVICE_NAME,
+        description="Sending transactions",
         recipe=ExecRecipe(
             [
                 "/bin/sh",

src/mev/mev_flood/mev_flood_launcher.star

@@ -35,6 +35,7 @@ def launch_mev_flood(
 
     plan.exec(
         service_name="mev-flood",
+        description="Initializing mev flood",
         recipe=ExecRecipe(
             command=[
                 "/bin/sh",
@@ -69,4 +70,8 @@ def spam_in_background(
                 el_uri, owner, user, seconds_per_bundle, joined_extra_args
             ),
         ]
-    plan.exec(service_name="mev-flood", recipe=ExecRecipe(command=command))
+    plan.exec(
+        service_name="mev-flood",
+        description="Sending spam transactions",
+        recipe=ExecRecipe(command=command),
+    )

src/network_launcher/devnet.star

@@ -12,6 +12,7 @@ def launch(plan, network, cancun_time, prague_time):
         name="el_cl_genesis",
     )
     el_cl_genesis_data_uuid = plan.run_sh(
+        description="Creating network configs",
         run="mkdir -p /network-configs/ && mv /opt/* /network-configs/",
         store=[StoreSpec(src="/network-configs/", name="el_cl_genesis_data")],
         files={"/opt": el_cl_genesis_uuid},

src/network_launcher/ephemery.star

@@ -6,6 +6,7 @@ el_cl_genesis_data = import_module(
 
 def launch(plan, cancun_time, prague_time):
     el_cl_genesis_data_uuid = plan.run_sh(
+        description="Creating network configs",
         run="mkdir -p /network-configs/ && \
             curl -o latest.tar.gz https://ephemery.dev/latest.tar.gz && \
             tar xvzf latest.tar.gz -C /network-configs && \

src/network_launcher/public_network.star

@@ -8,6 +8,7 @@ constants = import_module("../package_io/constants.star")
 def launch(plan, network, cancun_time, prague_time):
     # We are running a public network
     dummy_genesis_data = plan.run_sh(
+        description="Creating network configs folder",
         run="mkdir /network-configs",
         store=[StoreSpec(src="/network-configs/", name="el_cl_genesis_data")],
     )

src/network_launcher/shadowfork.star

@@ -15,6 +15,7 @@ def shadowfork_prep(
     # overload the network name to remove the shadowfork suffix
     if constants.NETWORK_NAME.ephemery in base_network:
         chain_id = plan.run_sh(
+            description="Fetching the chain id",
             run="curl -s https://ephemery.dev/latest/config.yaml | yq .DEPOSIT_CHAIN_ID | tr -d '\n'",
             image="linuxserver/yq",
         )
@@ -23,7 +24,8 @@ def shadowfork_prep(
         network_id = constants.NETWORK_ID[
             base_network
         ]  # overload the network id to match the network name
-    latest_block = plan.run_sh(  # fetch the latest block
+    latest_block = plan.run_sh(
+        description="Fetching the latest block",
         run="mkdir -p /shadowfork && \
             curl -o /shadowfork/latest_block.json "
         + network_params.network_sync_base_url

src/prelaunch_data_generator/el_cl_genesis/el_cl_genesis_generator.star

@@ -71,6 +71,7 @@ def generate_el_cl_genesis_data(
     files[GENESIS_VALUES_PATH] = genesis_generation_config_artifact_name
 
     genesis = plan.run_sh(
+        description="Creating genesis",
         run="cp /opt/values.env /config/values.env && ./entrypoint.sh all && mkdir /network-configs && mv /data/custom_config_data/* /network-configs/",
         image=image,
         files=files,
@@ -85,18 +86,21 @@ def generate_el_cl_genesis_data(
     )
 
     genesis_validators_root = plan.run_sh(
+        description="Reading genesis validators root",
         run="cat /data/genesis_validators_root.txt",
         files={"/data": genesis.files_artifacts[1]},
         wait=None,
     )
 
     cancun_time = plan.run_sh(
+        description="Reading cancun time from genesis",
         run="jq .config.cancunTime /data/network-configs/genesis.json | tr -d '\n'",
         image="badouralix/curl-jq",
         files={"/data": genesis.files_artifacts[0]},
     )
 
     prague_time = plan.run_sh(
+        description="Reading prague time from genesis",
         run="jq .config.pragueTime /data/network-configs/genesis.json | tr -d '\n'",
         image="badouralix/curl-jq",
         files={"/data": genesis.files_artifacts[0]},

src/prelaunch_data_generator/validator_keystores/validator_keystore_generator.star

@@ -116,7 +116,9 @@ def generate_validator_keystores(plan, mnemonic, participants):
     command_str = " && ".join(all_sub_command_strs)
 
     command_result = plan.exec(
-        recipe=ExecRecipe(command=["sh", "-c", command_str]), service_name=service_name
+        service_name=service_name,
+        description="Generating keystores",
+        recipe=ExecRecipe(command=["sh", "-c", command_str]),
     )
     plan.verify(command_result["code"], "==", SUCCESSFUL_EXEC_CMD_EXIT_CODE)
 
@@ -167,8 +169,9 @@ def generate_validator_keystores(plan, mnemonic, participants):
         ),
     ]
     write_prysm_password_file_cmd_result = plan.exec(
-        recipe=ExecRecipe(command=write_prysm_password_file_cmd),
         service_name=service_name,
+        description="Storing prysm password in a file",
+        recipe=ExecRecipe(command=write_prysm_password_file_cmd),
     )
     plan.verify(
         write_prysm_password_file_cmd_result["code"],
@@ -245,10 +248,11 @@ def generate_valdiator_keystores_in_parallel(plan, mnemonic, participants):
             # no generation command as validator count is 0
             continue
         plan.exec(
+            service_name=service_name,
+            description="Generating keystore for participant " + str(idx),
             recipe=ExecRecipe(
                 command=["sh", "-c", generation_command + " >/dev/null 2>&1 &"]
             ),
-            service_name=service_name,
         )
 
     # verify that files got created
@@ -319,8 +323,9 @@ def generate_valdiator_keystores_in_parallel(plan, mnemonic, participants):
         ),
     ]
     write_prysm_password_file_cmd_result = plan.exec(
-        recipe=ExecRecipe(command=write_prysm_password_file_cmd),
         service_name=service_names[0],
+        description="Storing prysm password in a file",
+        recipe=ExecRecipe(command=write_prysm_password_file_cmd),
     )
     plan.verify(
         write_prysm_password_file_cmd_result["code"],

src/shared_utils/shared_utils.star

@@ -53,6 +53,7 @@ def new_port_spec(
 def read_file_from_service(plan, service_name, filename):
     output = plan.exec(
         service_name=service_name,
+        description="Reading {} from {}".format(filename, service_name),
         recipe=ExecRecipe(
             command=["/bin/sh", "-c", "cat {} | tr -d '\n'".format(filename)]
         ),
@@ -77,6 +78,7 @@ def label_maker(client, client_type, image, connected_client, extra_labels):
 
 def get_devnet_enodes(plan, filename):
     enode_list = plan.run_python(
+        description="Getting devnet enodes",
         files={constants.GENESIS_DATA_MOUNTPOINT_ON_CLIENTS: filename},
         wait=None,
         run="""
@@ -93,6 +95,7 @@ print(",".join(bootnodes), end="")
 
 def get_devnet_enrs_list(plan, filename):
     enr_list = plan.run_python(
+        description="Creating devnet enrs list",
         files={constants.GENESIS_DATA_MOUNTPOINT_ON_CLIENTS: filename},
         wait=None,
         run="""
@@ -109,6 +112,7 @@ print(",".join(bootnodes), end="")
 
 def read_genesis_timestamp_from_config(plan, filename):
     value = plan.run_python(
+        description="Reading genesis timestamp from config",
         files={constants.GENESIS_DATA_MOUNTPOINT_ON_CLIENTS: filename},
         wait=None,
         packages=["PyYAML"],
@@ -127,6 +131,7 @@ print(min_genesis_time + genesis_delay, end="")
 
 def read_genesis_network_id_from_config(plan, filename):
     value = plan.run_python(
+        description="Reading genesis network id from config",
         files={constants.GENESIS_DATA_MOUNTPOINT_ON_CLIENTS: filename},
         wait=None,
         packages=["PyYAML"],
@@ -162,6 +167,7 @@ def get_network_name(network):
 # note that the timestamp it returns is a string
 def get_final_genesis_timestamp(plan, padding):
     result = plan.run_python(
+        description="Getting final genesis timestamp",
         run="""
 import time
 import sys