l2geth: rollup client style

Small style fix in the rollup client

Co-authored-by: r1cs

Update L2StandardTokenFactory deployment artefact and script

Remove examples from monorepo

l2geth: remove dead code in `blockchain.go` and `miner/worker.go`

l2geth: allow RPC transactions to go to `address(0)`

l2geth: removes the id from the evm

There are replaced by relevant tutorials in optimism-tutorials repo

Version Packages

Merge develop into master.

l2geth: small style fix to the state manager precompile

l2geth: delete pending tasks in miner

This PR deletes pending tasks in the miner codepath that result in
a buildup of state objects. The pending tasks will grow over time
without deleting them, resulting in a memory leak.

Updates the style to encapsulate the `err` so that it
doesn't need to reassign `err` and can instead keep
the `err` in its own scope.

This PR removes dead code that was responsible for timestamp management.
This codepath is no longer used so removing it will reduce the diff.

When the custom batch serialization was being used instead of RLP, a
transaction being sent to `address(0)` was not allowed because that
meant that it was a contract creation because there is no abi encoding
for `nil`. To prevent collisions, transactions sent via RPC to
`address(0)` were banned. Now the RLP transactions are being used, this
check can be removed. It helps to reduce the diff from upstream geth.

Faster development node (download instead of build)

Replacement to #1314

l2geth: remove diffdb

l2geth: remove unnecessary reflect

l2geth: small changes to miner codepath

l2geth: small syntax fix in the syncservice

This PR removes the diffdb as it is not currently being used.
Removing the diffdb is meant to help with resource usage of the node.

Very minor fix to the syncservice

These are minor changes to the miner codepath.

l2geth: remove layer of indirection with state manager

Add hardhat task for withdrawing ETH fees

There was a usage of `refect` that was not required. This PR removes its
usage so that the code is simplified.

This PR removes the assignment of a pointer to the
state manager abi and just directly uses it instead.
There is an assumption that the state manager abi exists,
but this check happens at startup time, when the abis are
pulled from the state dump.

The `id` field was added to the EVM to allow for the logs to make sense
during concurrent calls to EVM execution. It adds a diff and is not
required now that `eth_call` is no longer logged.

l2geth: update the start script to work with regenesis 0.4.0

Adding k8s api client to op_exporter

`scripts/start.sh` was never updated to work with the latest regenesis,
this should update it so that it does. I confirmed that the genesis
state roots do match when starting a node using this script and mainnet.

Update health handler to return version
Remove dead code, continue, return nil
Added ticker for k8s loop

fix: estimate gas when pending tx in mempool