perf: Dispatch Parquet Primitive PLAIN decoding to faster kernels when possible

[coastalwhite]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 73.06397% with 80 lines in your changes missing coverage. Please review.

Project coverage is 79.92%. Comparing base (0b0a914) to head (6c198c2).
Report is 6 commits behind head on main.

Files with missing lines	Patch %	Lines
crates/polars-arrow/src/bitmap/utils/mod.rs	70.50%	41 Missing ⚠️
crates/polars-arrow/src/bitmap/immutable.rs	52.50%	38 Missing ⚠️
...quet/src/arrow/read/deserialize/primitive/plain.rs	98.14%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #19611      +/-   ##
==========================================
- Coverage   79.96%   79.92%   -0.05%     
==========================================
  Files        1536     1536              
  Lines      211374   211616     +242     
  Branches     2445     2445              
==========================================
+ Hits       169034   169138     +104     
- Misses      41785    41923     +138     
  Partials      555      555              

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