feat(tests): add invalid BAL tests for spurious block_access_index

[nerolation]

🗒️ Description

This PR adds three negative test cases that ensure clients reject blocks whose Block Access List contains an out-of-range block_access_index (len(transactions)+2). The suite covers (1) a spurious storage entry whose slot is also legitimately read by another transaction, (2) the same but with a legitimate write, and (3) no other transactions touching the slot. In all variants, the block must be rejected with INVALID_BLOCK_ACCESS_LIST, ensuring strict bounds-checking of BAL indices independent of whether the referenced (address, slot) is otherwise accessed in-block.

🔗 Related Issues or PRs

EIP clarification ethereum/EIPs#10990

✅ 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.
• 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.

Cute Animal Picture

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 86.25%. Comparing base (2344445) to head (4117531).

Additional details and impacted files

@@                   Coverage Diff                    @@
##           eips/amsterdam/eip-7928    #1953   +/-   ##
========================================================
  Coverage                    86.25%   86.25%           
========================================================
  Files                          538      538           
  Lines                        34561    34561           
  Branches                      3224     3224           
========================================================
  Hits                         29809    29809           
  Misses                        4165     4165           
  Partials                       587      587           

Flag	Coverage Δ
unittests	86.25% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.