refactor: rename benchmark_tests to regression_tests

[aner-starkware]

This change is 

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 70.65%. Comparing base (1a814b9) to head (e8f6c6a).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #295   +/-   ##
=======================================
  Coverage   70.65%   70.65%           
=======================================
  Files          38       38           
  Lines        2021     2021           
  Branches     2021     2021           
=======================================
  Hits         1428     1428           
  Misses        524      524           
  Partials       69       69           

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[github-actions]

Benchmark movements:
tree_computation_flow performance improved 😺
tree_computation_flow time: [33.700 ms 33.734 ms 33.769 ms]
change: [-3.8625% -2.4315% -1.1502%] (p = 0.00 < 0.05)
Performance has improved.
Found 7 outliers among 100 measurements (7.00%)
6 (6.00%) high mild
1 (1.00%) high severe

[TzahiTaub]

Reviewed 2 of 2 files at r1, 1 of 1 files at r2, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @dorimedini-starkware)