feat(tests): extend block-gas inclusion boundary test to Osaka

[chfast]

🗒️ Description

The regular-gas cumulative inclusion gate probed by
test_tx_inclusion_at_regular_gas_block_limit_small (reject a tx whose
gas_limit exceeds block.gas_limit minus the cumulative gas used, strict

) is the pre-existing block-gas rule, not an EIP-8037 novelty, and its
construction (filler txs plus a bare-STOP excess tx) is fork-agnostic.
Lower its valid_from from EIP8037 to Osaka to add the missing
pre-Amsterdam fixtures.

The sibling test_tx_gas_larger_than_block_gas_limit does not cover this
boundary: its Op.INVALID txs consume their full gas, so the block's
final gas_used <= limit check, not the inclusion gate, decides validity.

Also pin the accepted case with header_verify(gas_used=block_gas_limit),
so the positive branch checks the produced block gas rather than only
that the block is valid.

Verified filling at Osaka (block_gas_limit=42_000; exceeds rejected with
GAS_ALLOWANCE_EXCEEDED) and Amsterdam (block_gas_limit=63_000).

🔗 Related Issues or PRs

N/A.

✅ 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).
• Tests: Ran mkdocs serve locally and verified the auto-generated docs for new tests in the Test Case Reference are correctly formatted.
• Tests: For PRs implementing a missed test case, update the post-mortem document to add an entry the list.
• Ported Tests: All converted JSON/YML tests from ethereum/tests or tests/static have been assigned @ported_from marker.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 93.22%. Comparing base (3f888bc) to head (2533fcc).
⚠️ Report is 9 commits behind head on forks/amsterdam.

Additional details and impacted files

@@                 Coverage Diff                 @@
##           forks/amsterdam    #3076      +/-   ##
===================================================
- Coverage            93.22%   93.22%   -0.01%     
===================================================
  Files                  624      624              
  Lines                36926    36939      +13     
  Branches              3377     3377              
===================================================
+ Hits                 34424    34436      +12     
- Misses                1708     1709       +1     
  Partials               794      794              

Flag	Coverage Δ
unittests	93.22% <ø> (-0.01%)	⬇️

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[spencer-tb]

LGTM! Thanks. I added a comment above the fork from range :)

[chfast]

LGTM! Thanks. I added a comment above the fork from range :)

Thanks.