chore: rename l1{-,_}provider for consistency

[giladchase]

No description provided.

[reviewable-StarkWare]

This change is 

[github-actions]

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[github-actions]

Benchmark movements:
full_committer_flow performance improved 😺
full_committer_flow time: [30.402 ms 30.482 ms 30.562 ms]
change: [-2.4394% -1.7677% -1.2607%] (p = 0.00 < 0.05)
Performance has improved.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 76.15%. Comparing base (e3165c4) to head (0b51f5c).
Report is 328 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #1979       +/-   ##
===========================================
+ Coverage   40.10%   76.15%   +36.05%     
===========================================
  Files          26      373      +347     
  Lines        1895    39857    +37962     
  Branches     1895    39857    +37962     
===========================================
+ Hits          760    30355    +29595     
- Misses       1100     7241     +6141     
- Partials       35     2261     +2226     

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[elintul]

Reviewed 6 of 6 files at r1, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @giladchase)