perf(rust): Add proper distributor to new-streaming parquet reader

[orlp]

The same should probably be done for the CSV one as well.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 59 lines in your changes missing coverage. Please review.

Project coverage is 79.01%. Comparing base (8e27477) to head (f8b2208).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...polars-stream/src/nodes/io_sources/parquet/init.rs	0.00%	54 Missing ⚠️
.../polars-stream/src/nodes/io_sources/parquet/mod.rs	0.00%	5 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #20372      +/-   ##
==========================================
+ Coverage   78.99%   79.01%   +0.02%     
==========================================
  Files        1563     1563              
  Lines      220650   220592      -58     
  Branches     2492     2492              
==========================================
+ Hits       174304   174306       +2     
+ Misses      45773    45713      -60     
  Partials      573      573              

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[nameexhaustion]

Wrapping this join_task AbortOnDropHandle here doesn't cancel all of the previous tasks - the handles for those tasks should be individually wrapped in AbortOnDropHandle as soon as they are created.