perf: Utilize the RangedUniqueKernel for Enum/Categorical

[coastalwhite]

I was improving the kernel in preparation for some Parquet work and I wanted to apply it somewhere before I got to the actual Parquet work.

This does lead to significant speedups (~11x in the following benchmark).

[codecov]

Codecov Report

Attention: Patch coverage is 45.04505% with 122 lines in your changes missing coverage. Please review.

Project coverage is 79.57%. Comparing base (bcfa7ec) to head (bf143cd).
Report is 39 commits behind head on main.

Files with missing lines	Patch %	Lines
crates/polars-compute/src/unique/primitive.rs	41.73%	74 Missing ⚠️
crates/polars-compute/src/unique/dictionary.rs	31.57%	26 Missing ⚠️
...rc/chunked_array/logical/categorical/ops/unique.rs	33.33%	12 Missing ⚠️
crates/polars-compute/src/unique/boolean.rs	78.12%	7 Missing ⚠️
crates/polars-arrow/src/array/dictionary/mod.rs	0.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #20150      +/-   ##
==========================================
- Coverage   79.57%   79.57%   -0.01%     
==========================================
  Files        1563     1564       +1     
  Lines      217395   217474      +79     
  Branches     2472     2472              
==========================================
+ Hits       172986   173048      +62     
- Misses      43841    43858      +17     
  Partials      568      568              

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