SIMD backend for poseidon252 merkle ops - CPU IMPL

[shaharsamocha7]

This change is 

[shaharsamocha7]

• #812
• #811
• #809 👈
• dev

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[codecov-commenter]

Codecov Report

Attention: Patch coverage is 46.66667% with 16 lines in your changes missing coverage. Please review.

Project coverage is 92.13%. Comparing base (387a072) to head (b15bcbd). Report is 5 commits behind head on dev.

Files with missing lines	Patch %	Lines
crates/prover/src/core/backend/simd/poseidon252.rs	0.00%	16 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## dev #809 +/- ## ========================================== - Coverage 92.25% 92.13% -0.12% ========================================== Files 91 93 +2 Lines 12461 12477 +16 Branches 12461 12477 +16 ========================================== Hits 11496 11496 - Misses 859 875 +16 Partials 106 106 ```

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[shaharsamocha7]

Merge activity

• Aug 29, 6:21 AM EDT: @shaharsamocha7 started a stack merge that includes this pull request via Graphite.
• Aug 29, 6:21 AM EDT: @shaharsamocha7 merged this pull request with Graphite.