Refactored sint32 to use the BlockExt trait

[tcoratger]

Checklist

• Linked to Github Issue
• Unit tests added
• Integration tests added.
• This change requires new documentation.
  • Documentation has been added/updated.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 96.38554% with 3 lines in your changes missing coverage. Please review.

Project coverage is 91.83%. Comparing base (b2f1568) to head (033cdbb).
Report is 12 commits behind head on main.

Files	Patch %	Lines
src/libfuncs/sint32.rs	96.38%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #664      +/-   ##
==========================================
- Coverage   91.95%   91.83%   -0.13%     
==========================================
  Files         112      115       +3     
  Lines       34265    34288      +23     
==========================================
- Hits        31509    31489      -20     
- Misses       2756     2799      +43     

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