Don't let unit test modify the source folder.

[hertschuh]

This required changing some tests to use a temporary folder instead of the current one.

Changed some unit tests to use a temporary folder instead of the current one. This uses self.get_temp_dir(), which auto cleans up and makes the tests easier.

Also fixed file_utils.filter_safe_zipinfos and filter_safe_tarinfos to resolve links within the context of the destination folder instead of hardcoding "." as the destination path.

[gemini-code-assist]

Note

Gemini is unable to generate a summary for this pull request due to the file types involved not being currently supported.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 82.77%. Comparing base (0238793) to head (d3756b4).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #22194      +/-   ##
==========================================
- Coverage   82.77%   82.77%   -0.01%     
==========================================
  Files         593      593              
  Lines       63867    63866       -1     
  Branches    10040    10040              
==========================================
- Hits        52866    52865       -1     
  Misses       8424     8424              
  Partials     2577     2577              

Flag	Coverage Δ
keras	82.59% <100.00%> (-0.01%)	⬇️
keras-jax	62.24% <100.00%> (-0.01%)	⬇️
keras-numpy	56.37% <100.00%> (-0.01%)	⬇️
keras-openvino	37.53% <50.00%> (-0.01%)	⬇️
keras-tensorflow	63.48% <100.00%> (-0.01%)	⬇️
keras-torch	62.30% <100.00%> (-0.01%)	⬇️

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