refactor: Dispatch through pl.map_batches and AnonymousColumnsUdf

[coastalwhite]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 79.74684% with 48 lines in your changes missing coverage. Please review.
✅ Project coverage is 81.47%. Comparing base (376e86c) to head (6586cb4).
⚠️ Report is 13 commits behind head on main.

Files with missing lines	Patch %	Lines
crates/polars-plan/src/dsl/mod.rs	65.90%	15 Missing ⚠️
...rates/polars-plan/src/dsl/python_dsl/python_udf.rs	75.75%	8 Missing ⚠️
crates/polars-plan/src/dsl/name.rs	0.00%	5 Missing ⚠️
py-polars/polars/functions/lazy.py	85.18%	2 Missing and 2 partials ⚠️
crates/polars-plan/src/dsl/expr/expr_dyn_fn.rs	78.57%	3 Missing ⚠️
crates/polars-plan/src/dsl/expr/serde_expr.rs	25.00%	3 Missing ⚠️
crates/polars-expr/src/expressions/apply.rs	80.00%	2 Missing ⚠️
crates/polars-ops/src/chunked_array/list/get.rs	66.66%	2 Missing ⚠️
crates/polars-plan/src/plans/visitor/expr.rs	0.00%	2 Missing ⚠️
crates/polars-plan/src/plans/aexpr/equality.rs	0.00%	1 Missing ⚠️
... and 3 more

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #23867      +/-   ##
==========================================
+ Coverage   81.40%   81.47%   +0.06%     
==========================================
  Files        1669     1668       -1     
  Lines      225114   224785     -329     
  Branches     2903     2905       +2     
==========================================
- Hits       183259   183145     -114     
+ Misses      41130    40915     -215     
  Partials      725      725              

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