chore(ci): use self-hosted runners and harden hive dev mode

[danceratopz]

🗒️ Description

• Moves the consume ci checks to use self-hosted runners to solve "no space left on device" issues with Github runners (cf chore(ci): bump hive consume runner to self hosted #1855).
• Create reusable start-hive-dev action with the robust startup waiting logic that was originally added in fix(github): Fix benchmark genesis generation #1800.
• Refactor build-benchmark-genesis and hive-consume workflows to use the new action.

Problem

The dev-mode job in hive-consume.yaml can fail due to a race condition. The wait loop only polled for 60 seconds (30 iterations × 2s), but Hive takes longer to build Docker images (hiveproxy, client images). The loop silently fell through without failing, causing the next step to start while Hive was still building - resulting in "Error connecting to hive simulator" failures. Example flow:

• https://github.com/ethereum/execution-specs/actions/runs/19991793699/job/57333576450?pr=1855

This behavior is also seen in this screenshot:

Solution

Extract the robust waiting logic from build-benchmark-genesis (which already had proper timeout handling) into a reusable action that:

• Uses deadline-based timeout instead of iteration count.
• Monitors process health to detect if Hive crashes (kill -0).
• Fails explicitly on timeout with clear error messages.
• Outputs hive-url for use in subsequent steps.

🔗 Related Issues or PRs

N/A.

✅ Checklist

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

  uvx tox -e 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 adding an entry to CHANGELOG.md. skipped
• All: Considered updating the online docs in the ./docs/ directory.
• All: Set appropriate labels for the changes (only maintainers can apply labels).

Cute Animal Picture

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 87.31%. Comparing base (9523e75) to head (ca7cc47).
⚠️ Report is 9 commits behind head on forks/osaka.

Additional details and impacted files

@@             Coverage Diff              @@
##           forks/osaka    #1861   +/-   ##
============================================
  Coverage        87.31%   87.31%           
============================================
  Files              541      541           
  Lines            32832    32832           
  Branches          3015     3015           
============================================
  Hits             28668    28668           
  Misses            3557     3557           
  Partials           607      607           

Flag	Coverage Δ
unittests	87.31% <ø> (ø)

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[spencer-tb]

LGTM! CI is passing woo! 🙌