fix compare initial and final values

[Tabaie]

• Fix a bug where no comparison between initial and final values of execution public input was being performed.
• Implement the "rollingHash = 0 implies no update" logic.
• Reduce the runtime of PI circuit tests by running 16 instances instead of 84 and mocking keccak wizard verification.

Checklist

• I wrote new tests for my new core changes.
• I have successfully run tests, style checker and build against my new changes locally.
• I have informed the team of any breaking changes if there are any.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 70.57%. Comparing base (333bc77) to head (dfd0487).

Additional details and impacted files

@@            Coverage Diff            @@
##               main     #219   +/-   ##
=========================================
  Coverage     70.57%   70.57%           
  Complexity     1059     1059           
=========================================
  Files           291      291           
  Lines         11960    11960           
  Branches       1103     1103           
=========================================
  Hits           8441     8441           
  Misses         3039     3039           
  Partials        480      480           

Flag	Coverage Δ
hardhat	98.67% <ø> (ø)
kotlin	68.26% <ø> (ø)

[gusiri]

LGTM