fixed newHash assignment

[Soleimani193]

This PR fixes the bug in the padding module. On the prover side, the NewHash Column should be assigned based on the index column. When the index becomes zero a newHash is launched. In the previous implementation, NewHash was assigned via HashNum which was not correct. Due to the required change, some testes are not passing since they have empty or incorrect indexes. these tests are also fixed.

Checklist

• [ ] I wrote new tests for my new core changes.
• [ ] I have successfully ran 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 :white_check_mark:

Project coverage is 70.36%. Comparing base (8f67c1e) to head (304171b). Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##               main     #161   +/-   ##
=========================================
  Coverage     70.36%   70.36%           
  Complexity     1040     1040           
=========================================
  Files           282      282           
  Lines         11316    11316           
  Branches       1083     1031   -52     
=========================================
  Hits           7963     7963           
  Misses         2886     2886           
  Partials        467      467           

Flag	Coverage Δ		*Carryforward flag
hardhat	98.70% <ø> (ø)
kotlin	67.84% <ø> (ø)		Carriedforward from a68e65b

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