feat: enable teku split beacon <> validator setup (#409)

.github/tests/split-teku.yaml

+participants:
+  - el_client_type: geth
+    cl_client_type: teku
+    cl_split_mode_enabled: true
+    validator_count: 0
+  - el_client_type: nethermind
+    cl_client_type: teku
+    cl_split_mode_enabled: true
+  - el_client_type: erigon
+    cl_client_type: teku
+    cl_split_mode_enabled: true
+  - el_client_type: besu
+    cl_client_type: teku
+    cl_split_mode_enabled: true
+  - el_client_type: reth
+    cl_client_type: teku
+    cl_split_mode_enabled: true
+  - el_client_type: ethereumjs
+    cl_client_type: teku
+    cl_split_mode_enabled: true
+additional_services: []

src/cl/nimbus/nimbus_launcher.star

@@ -47,10 +47,6 @@ VALIDATOR_MAX_MEMORY = 512
 DEFAULT_VALIDATOR_IMAGE_ENTRYPOINT = ["nimbus_validator_client"]
 
 VALIDATOR_METRICS_PATH = "/metrics"
-
-VALIDATOR_KEYS_DIRPATH_ON_SERVICE_CONTAINER = "$HOME/validator-keys"
-VALIDATOR_SECRETS_DIRPATH_ON_SERVICE_CONTAINER = "$HOME/validator-secrets"
-
 # ---------------------------------- Genesis Files ----------------------------------
 
 # Nimbus requires that its data directory already exists (because it expects you to bind-mount it), so we
@@ -360,7 +356,7 @@ def get_beacon_config(
     files = {
         constants.GENESIS_DATA_MOUNTPOINT_ON_CLIENTS: el_cl_genesis_data.files_artifact_uuid,
     }
-    if node_keystore_files:
+    if node_keystore_files != None and not split_mode_enabled:
         files[
             VALIDATOR_KEYS_MOUNTPOINT_ON_CLIENTS
         ] = node_keystore_files.files_artifact_uuid

src/prelaunch_data_generator/validator_keystores/validator_keystore_generator.star

@@ -102,8 +102,15 @@ def generate_validator_keystores(plan, mnemonic, participants):
             start_index,
             stop_index,
         )
-
+        teku_permissions_cmd = (
+            "chmod 0777 -R " + output_dirpath + "/" + TEKU_KEYS_DIRNAME
+        )
+        raw_secret_permissions_cmd = (
+            "chmod 0600 -R " + output_dirpath + "/" + RAW_SECRETS_DIRNAME
+        )
         all_sub_command_strs.append(generate_keystores_cmd)
+        all_sub_command_strs.append(teku_permissions_cmd)
+        all_sub_command_strs.append(raw_secret_permissions_cmd)
         all_output_dirpaths.append(output_dirpath)
 
     command_str = " && ".join(all_sub_command_strs)