feat(fork): Add basic Amsterdam fork support

[fselmo]

🗒️ Description

PR #2067 moves Block Access List (BAL) tests into Amsterdam but Amsterdam fork should be introduced by itself. In case we begin adding other EIPs while still iterating on BAL, we don't want to attach the fork to that PR.

I will remove the fork addition from there and build on top of this once this is ready and merged.

🔗 Related Issues or PRs

#2067

✅ Checklist

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

  uvx --with=tox-uv tox -e lint,typecheck,spellcheck,markdownlint

• 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.
• All: Considered updating the online docs in the ./docs/ directory.
• All: Set appropriate labels for the changes (only maintainers can apply labels).

[fselmo]

For now I'm pointing this to the most up-to-date Amsterdam branch on the EELS side in the resolutions file.

I'm not quite sure why running uv run fill --fork=Amsterdam --clean runs into some issues with excess_blob_gas in header. Looking into it. But I wanted to separate the fork addition from PR #2067.

[spencer-tb]

LGTM! Just one small comment. Feel free to merge