feat(test-cli): Add support for testing block building via simulator

[fselmo]

🗒️ Description

Adds a hive-based simulator that verifies EL clients build correct blocks via testing_buildBlockV1

For each payload in a blockchain_test_engine fixture, the test sends the expected transactions and block attributes to the client's block building endpoint. The resulting block is validated against the fixture's expected output (state_root, receipts_root, etc). The fixture block is then imported via engine_newPayloadVX to advance the chain for subsequent blocks.

gas_limit is validated a bit different for now, since testing_buildBlockV1 doesn't accept a gas limit parameter. The client picks its own within the EIP-1559 adjustment range so we validate it is within that range until we can actually account for the gas limit. For this reason, block_hash is also excluded from comparison as it depends on gas_limit.

Also looking for recs on the naming (uv run build-block). We could go with build by itself but it feels vague to me. That said, I can be easily convinced here 😄.

🔗 Related Issues or PRs

closes #2560

✅ Checklist

• All: Ran fast static checks to avoid unnecessary CI fails, see also Code Standards and Enabling Pre-commit Checks:

  just static

• All: PR title adheres to the repo standard - it will be used as the squash commit message and should start type(scope):.
• All: Considered updating the online docs in the ./docs/ directory.
• All: Set appropriate labels for the changes (only maintainers can apply labels).

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 86.26%. Comparing base (6672cfe) to head (795a4f9).
⚠️ Report is 7 commits behind head on forks/amsterdam.

Additional details and impacted files

@@               Coverage Diff                @@
##           forks/amsterdam    #2679   +/-   ##
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  Coverage            86.25%   86.26%           
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  Files                  599      599           
  Lines                37032    37038    +6     
  Branches              3795     3795           
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+ Hits                 31943    31949    +6     
  Misses                4525     4525           
  Partials               564      564           

Flag	Coverage Δ
unittests	86.26% <ø> (+<0.01%)	⬆️

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[marioevz]

Looks great! Just two comments to try to improve maintainability.

[fselmo]

@marioevz lmk if the last commit here is what you meant. I re-ran against geth bal-devnet-3 with this cherry-picked there with some minor updates that are needed (slotnum, etc) and it's still running smooth 👍🏼

[LouisTsai-Csie]

This is not important but maybe we could have something like this for the entire if-else comparison:

command_name = self.command_name
simulator_command_list = ["engine", "enginex", ...]

if command_name in simulator_command_list:
  modified_args.extend(
      [
          "-p",
          f"execution_testing.cli.pytest_commands.plugins.consume.simulators.{command_name}.conftest",
      ]
  )

else:
  raise ValueError(f"Unknown command name: {self.command_name}")

i would like to continue on reviewing the remaining part of the PR!