feat: Ensure binview types are rle-encoded in parquet write

[ritchie46]

closes #14814

[codecov]

Codecov Report

Attention: Patch coverage is 44.06780% with 33 lines in your changes are missing coverage. Please review.

Project coverage is 80.94%. Comparing base (a34e2b0) to head (f87f8b5).
Report is 1 commits behind head on main.

Files	Patch %	Lines
...rates/polars-parquet/src/arrow/write/dictionary.rs	23.52%	13 Missing ⚠️
crates/polars-arrow/src/array/binview/mutable.rs	33.33%	8 Missing ⚠️
crates/polars-arrow/src/compute/cast/binview_to.rs	50.00%	7 Missing ⚠️
crates/polars-arrow/src/array/indexable.rs	66.66%	3 Missing ⚠️
crates/polars-arrow/src/compute/cast/mod.rs	66.66%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #14818      +/-   ##
==========================================
- Coverage   80.94%   80.94%   -0.01%     
==========================================
  Files        1325     1325              
  Lines      171952   172002      +50     
  Branches     2452     2452              
==========================================
+ Hits       139188   139225      +37     
- Misses      32292    32307      +15     
+ Partials      472      470       -2     

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