perf: Enable Parquet parallel=prefiltered for auto

[coastalwhite]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 88.28125% with 15 lines in your changes missing coverage. Please review.

Project coverage is 79.86%. Comparing base (4dc90a9) to head (266846d).
Report is 8 commits behind head on main.

Files with missing lines	Patch %	Lines
crates/polars-io/src/parquet/read/read_impl.rs	88.28%	15 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #18514      +/-   ##
==========================================
- Coverage   79.87%   79.86%   -0.01%     
==========================================
  Files        1501     1501              
  Lines      202032   202065      +33     
  Branches     2868     2868              
==========================================
+ Hits       161370   161385      +15     
- Misses      40115    40133      +18     
  Partials      547      547              

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