fix(tests): fix EIP-7934 tests logic accuracy

[fselmo]

🗒️ Description

We had some issues filling EIP-7934 tests for Amsterdam after introducing tests for EIP-7843, that we very quickly patched (here) so we could get the tests released. This "fix" was more of a bandaid fix that was likely going to leak issues out again eventually. This PR aims to fix this in a more proper way as this is still currently failing one test in forks/amsterdam since we haven't introduced this fix here.

• First few commits here Claude added +/- 1byte tolerance which helps us not have to find a perfect match (original problem). Then optimized the search by changing from linear to binary search.
• I then went down a path to play with increasing the starting extraData to half of what it can be. extraData is a 32-byte field, so if we start somewhere in the middle we can have even better tolerance. It turns out that our calldata estimate for the last tx is good enough where we're always within ~5 bytes of what we need. This actually removes the need for the binary search entirely as we have plenty of tolerance to adjust with block extraData.

This PR brings the fill time for these tests down significantly to where I don't believe these tests are a burden on fill anymore.

---

Bonus:

Fix typo in EIP-7251 BAL tests that was just merged to forks/amsterdam and slipped by PR reviews.

✅ 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: Set appropriate labels for the changes (only maintainers can apply labels).

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 86.14%. Comparing base (c6c380a) to head (ad55b5e).
⚠️ Report is 1 commits behind head on forks/amsterdam.

Additional details and impacted files

@@               Coverage Diff                @@
##           forks/amsterdam    #2078   +/-   ##
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  Coverage            86.14%   86.14%           
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  Files                  599      599           
  Lines                39472    39472           
  Branches              3780     3780           
================================================
  Hits                 34002    34002           
  Misses                4848     4848           
  Partials               622      622           

Flag	Coverage Δ
unittests	86.14% <ø> (ø)

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[gurukamath]

Just a minor nit about the values returned by the exact_size_transactions. Looks good to me otherwise