ci: Make nightly CI work with new polars packaging

[AndreasAlbertQC]

Motivation

Polars has recently restructured the way their packages work on pypi. As a result, it's not sufficient to install polars, which now does not include the rust binaries anymore, but you also need to install polars-runtime-32 in addition. We could achieve this by either installing it explicitly or removing the --no-deps argument to pip. I opted for an explicit install because I like that this makes it very clear what packages we replace here.

Changes

• Added pip installation of polars-runtime-32 to setup for nightly CI

Validation

• Manual test run ✅

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (bcebfc8) to head (bbe0078).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##              main      #164   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           51        51           
  Lines         2903      2903           
=========================================
  Hits          2903      2903           

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[borchero]

Thanks!