[WIP] [DA] Sinkhorn LpL1 transport to work on JAX

[kachayev]

Types of changes

This PR presents a vectorized implementation of LpL1 transport algorithms for domain adaptation, along with all the requisite modifications to ensure compatibility of the ot.da module with JAX.

Motivation and context / Related issue

Continuing the effort to enable Domain Adaptation functionality in JAX. See also previously introduced changes in PR #587 for details.

How has this been tested (if it applies)

The tests have been updated. Additionally, a dedicated test has been included to verify that the vectorized implementation produces the same results as the original code.

PR checklist

• I have read the CONTRIBUTING document.
• The documentation is up-to-date with the changes I made (check build artifacts).
• All tests passed, and additional code has been covered with new tests.
• I have added the PR and Issue fix to the RELEASES.md file.

[codecov]

Codecov Report

Merging #592 (cbd3d64) into master (c84ef33) will increase coverage by 0.00%.
The diff coverage is 100.00%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #592   +/-   ##
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  Coverage   96.75%   96.76%           
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  Files          77       77           
  Lines       15961    15991   +30     
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+ Hits        15443    15473   +30     
  Misses        518      518