chore(code/test): Move max_block_size to test configuration

[ancazamfir]

Closes: #845

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PR author checklist

For all contributors

• Reference GitHub issue
• Ensure PR title follows the conventional commits spec

For external contributors

• Maintainers of Malachite are allowed to push changes to the branch

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 81.65%. Comparing base (88b4193) to head (bcc9b04).
Report is 1 commits behind head on main.

✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #846      +/-   ##
==========================================
- Coverage   81.89%   81.65%   -0.24%     
==========================================
  Files         182      182              
  Lines       16269    16266       -3     
==========================================
- Hits        13323    13282      -41     
- Misses       2946     2984      +38     

Flag	Coverage Δ
integration	81.49% <ø> (-0.24%)	⬇️
mbt	8.51% <ø> (-<0.01%)	⬇️

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Components	Coverage Δ
core	∅ <ø> (∅)
engine	∅ <ø> (∅)
app	∅ <ø> (∅)
starknet	∅ <ø> (∅)