Use uv for CI

[ejm714]

Swaps in drivendataorg/setup-python-uv-action and installs our dependencies with uv (without caching).

Closes #312

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[jayqi]

I think densepose fails to install because they do a build-time check of whether torch is installed, which doesn't work with modern standard of isolated builds. It looks like uv doesn't currently support installing without build isolation: astral-sh/uv#1715

(The discussion in the thread is also a good summary explaining the history and the why of packages behaving like densepose.)

[jayqi]

@ejm714 I just thought of a possible gotcha in how uv and setup-python-uv-action is set up. It's possible that the virtual environment created by setup-python-uv-action doesn't have pip installed in it, and so when you run pip install densepose, it's using the system pip. You might want to print out which pip and/or run uv pip install pip before trying to install densepose.

[jayqi]

uv 0.1.16, released yesterday, now supports --no-build-isolation so I think you should be able to use it to install densepose.

https://github.com/astral-sh/uv/releases/tag/0.1.16

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 87.6%. Comparing base (dc87a8a) to head (be58fb6).

Additional details and impacted files

@@          Coverage Diff           @@
##           master    #311   +/-   ##
======================================
  Coverage    87.6%   87.6%           
======================================
  Files          26      26           
  Lines        2178    2178           
======================================
  Hits         1908    1908           
  Misses        270     270           

[ejm714]

In the end, looks like a 5-10 min speed up which is small in a relative sense. Tests are still the slowest part of this and we stick to pip for the installation tests (due to transitive dependencies) so overall run is still at least 30 min.

Ready for a final look @pjbull or @jayqi

[pjbull]

Looks good, thanks for tackling!