perf: Rechunk in DataFrame.rows if needed

[orlp]

Fixes #19627.

[codecov]

Codecov Report

Attention: Patch coverage is 93.54839% with 2 lines in your changes missing coverage. Please review.

Project coverage is 79.92%. Comparing base (e52a598) to head (e78319c).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
...ipe/src/executors/sinks/group_by/generic/source.rs	0.00%	1 Missing ⚠️
...olars-pipe/src/executors/sinks/output/file_sink.rs	50.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #19628   +/-   ##
=======================================
  Coverage   79.91%   79.92%           
=======================================
  Files        1536     1536           
  Lines      211659   211686   +27     
  Branches     2445     2445           
=======================================
+ Hits       169156   169186   +30     
+ Misses      41948    41945    -3     
  Partials      555      555           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.