fix(python): Release GIL in gather_with_series() and friend

[itamarst]

Fixes the reported part of #19358, but there may be other similar regressions as yet unreported.

Given that caveat, @ritchie46 also wanted to (temporarily) revert #19199 too since that's what made this regression start happening.

The full fix will be #19382, after which #19199 can be reapplied.

[codecov]

Codecov Report

Attention: Patch coverage is 50.00000% with 2 lines in your changes missing coverage. Please review.

Project coverage is 80.19%. Comparing base (1d210ab) to head (0421cc3).
Report is 6 commits behind head on main.

Files with missing lines	Patch %	Lines
crates/polars-python/src/dataframe/general.rs	50.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #19383      +/-   ##
==========================================
- Coverage   80.21%   80.19%   -0.02%     
==========================================
  Files        1523     1527       +4     
  Lines      210096   210341     +245     
  Branches     2432     2430       -2     
==========================================
+ Hits       168526   168682     +156     
- Misses      41014    41105      +91     
+ Partials      556      554       -2     

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