Fix: Add dtype to empty_like function

[JasonHonKL]

Proposed changes

(Please merge previous PR) @reckylurker
Fix #4001

Update

Added test with the empty_like function. Remove public APIs of empty like.

Checklist

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• I have read the CONTRIBUTING document
• I have run pre-commit run --all-files to format my code / installed pre-commit prior to committing changes
• I have added tests that prove my fix is effective or that my feature works
• I have updated the necessary documentation (if needed)

[zcbenz]

Can you make the C++ zeros_like take additional dtype while keeping empty_like unchanged as an alias? Also we prefer hiding empty/empty_like from public APIs as we don't want to have multiple APIs doing the same thing.

[JasonHonKL]

@zcbenz Sure no problem.

[JasonHonKL]

@zcbenz Removed the public APIs. Since at the beginning zero_likes is the same as empty_like, and zero_likes is updated, this PR just adds tests to verify empty_like. Thanks for the reminder !

[zcbenz]

Ah sorry I forgot #4028 just updated the zeros_like. Since empty_like is a trivial alias of zeros_like we don't really need to add more tests, so I'm closing this PR.