Refactor gas

[RajeshRk18]

Refactored gas libfuncs to use BlockExt

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

All modified and coverable lines are covered by tests ✅

Project coverage is 89.73%. Comparing base (bd23b1c) to head (c92ce64).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #571      +/-   ##
==========================================
- Coverage   89.74%   89.73%   -0.01%     
==========================================
  Files         108      108              
  Lines       34534    34505      -29     
==========================================
- Hits        30991    30962      -29     
  Misses       3543     3543              

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