refactor: Use Column in Row Encoding

[coastalwhite]

Now we can use Column for unordered Row-Encoding and the python interface now calls the standard functions.

[codecov]

Codecov Report

Attention: Patch coverage is 92.10526% with 3 lines in your changes missing coverage. Please review.

Project coverage is 79.62%. Comparing base (ff95fad) to head (a9af910).
Report is 46 commits behind head on main.

Files with missing lines	Patch %	Lines
crates/polars-expr/src/hash_keys.rs	0.00%	2 Missing ⚠️
crates/polars-ops/src/frame/join/mod.rs	66.66%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #20312   +/-   ##
=======================================
  Coverage   79.61%   79.62%           
=======================================
  Files        1567     1567           
  Lines      218453   218428   -25     
  Branches     2462     2462           
=======================================
- Hits       173921   173916    -5     
+ Misses      43965    43945   -20     
  Partials      567      567           

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