[HfFileSystem] Fix rm on branch

[lhoestq]

This code returns EntryNotFoundError even if the file exists

fs.rm("datasets/username/datasetname@branch/data.txt")

and would only work on main.

[HuggingFaceDocBuilderDev]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (36ad912) 82.44% compared to head (35ba031) 82.52%.
Report is 6 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1957      +/-   ##
==========================================
+ Coverage   82.44%   82.52%   +0.08%     
==========================================
  Files          66       66              
  Lines        8138     8154      +16     
==========================================
+ Hits         6709     6729      +20     
+ Misses       1429     1425       -4     

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[Wauplin]

Thanks for reporting and fixing this @lhoestq! Do you mind adding a regression test for it in test_hf_file_system.py? Thanks in advance!

[mariosasko]

LGTM, thanks!

[Wauplin]

Thanks! Let's get it merged :)