fix: Materialize list.eval with unknown type

[coastalwhite]

Fixes #23089.

This is made to mirror the monstrosity that is

polars/crates/polars-lazy/src/dsl/eval.rs

Line 9 in 409d744

pub(crate) fn eval_field_to_dtype(f: &Field, expr: &Expr, list: bool) -> Field {

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 80.60%. Comparing base (7cb263a) to head (a96ca8e).
Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #23186      +/-   ##
==========================================
- Coverage   80.61%   80.60%   -0.01%     
==========================================
  Files        1636     1639       +3     
  Lines      219815   219992     +177     
  Branches     2806     2814       +8     
==========================================
+ Hits       177207   177328     +121     
- Misses      41942    41998      +56     
  Partials      666      666              

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