refactor(spec): use uint32 instead of uint64 for block access index

[fselmo]

🗒️ Description

As discussed in ACDT #78, move to using uint32 for block access index. Spec change for this is also coming.

compare to: #2713

• 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).

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[spencer-tb]

LGTM! Sorry for the u64 change haha

[codecov]

Codecov Report

❌ Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 86.26%. Comparing base (0345cf1) to head (4f69758).
⚠️ Report is 2 commits behind head on forks/amsterdam.

Files with missing lines	Patch %	Lines
src/ethereum/forks/amsterdam/block_access_lists.py	0.00%	2 Missing ⚠️

Additional details and impacted files

@@               Coverage Diff                @@
##           forks/amsterdam    #2730   +/-   ##
================================================
  Coverage            86.26%   86.26%           
================================================
  Files                  599      599           
  Lines                37038    37038           
  Branches              3795     3795           
================================================
  Hits                 31949    31949           
  Misses                4525     4525           
  Partials               564      564           

Flag	Coverage Δ
unittests	86.26% <0.00%> (ø)

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[fselmo]

LGTM! Sorry for the u64 change haha

All good, this was just (re)decided 😄 ... this time on ACDT and was agreed upon. EIP change incoming.