feat(tests): EIP-8037 calldata floor binds with an over-cap reservoir

[chfast]

🗒️ Description

A tx with large floor-binding calldata and gas_limit > TX_MAX_GAS_LIMIT does an SSTORE-set funded from the reservoir. The EIP-7976 floor is the sender's bill (receipt cumulative_gas_used = floor), while the block accounts regular and state separately: block-regular excludes the floor, so the header gas_used is the state dimension (97_920), not the floor.

Also fix the stale module docstring that claimed block-regular uses max(tx_regular, floor); the spec/impl apply the floor only to the sender's charge (fork.py:1095 vs :1135).

🔗 Related Issues or PRs

N/A.

✅ Checklist

• All: Ran fast static checks to avoid unnecessary CI fails, see also Code Standards and Verifying Changes:

  just static

• All: PR title have the form <type>(<area>):, where <type> and <area> come from an approrpriate C-<type>, respectively A-<area>, label. The title should match the a target squash commit message.
• All: Considered updating the online docs in the ./docs/ directory.
• All: Set appropriate labels for the changes (only maintainers can apply labels).
• Tests: For PRs implementing a missed test case, update the post-mortem document to add an entry the list.
• Ported Tests: Add the following docstring to manually enhanced tests from ./tests/ported_static/:

  @manually-enhanced: Do not overwrite. Post-state expectations corrected
  manually (see PR #2784).
  

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 93.22%. Comparing base (9920b6e) to head (fccd1f9).

Additional details and impacted files

@@               Coverage Diff                @@
##           forks/amsterdam    #3080   +/-   ##
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  Coverage            93.22%   93.22%           
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  Files                  624      624           
  Lines                36936    36936           
  Branches              3377     3377           
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  Hits                 34433    34433           
  Misses                1709     1709           
  Partials               794      794           

Flag	Coverage Δ
unittests	93.22% <ø> (ø)

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