Preserve list element metadata when rebuilding scalar values

[osipovartem]

Summary

ScalarValue::cast_to reconstructs LIST values through SingleRowListArrayBuilder::with_field. That builder copied the child field name and nullability but dropped its metadata. Casting a LIST to a target field containing nested metadata (for example an Iceberg PARQUET:field_id) therefore produced a scalar with a different type from the requested target, and subsequent batch expansion could fail schema validation.

Copy the field metadata as well. This only runs when constructing a scalar LIST; columnar cast and batch fast paths are unchanged.

Validation

• New regression test covers LIST scalar cast to a metadata-bearing element field and batch expansion.
• cargo +1.95.0 test --offline -p datafusion-common --lib: 624 passed.
• cargo +1.95.0 fmt --all --check: passed.
• Independent read-only review: approved, no blocking findings.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 89.47368% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 82.72%. Comparing base (db83fcc) to head (3acb8ec).

Files with missing lines	Patch %	Lines
datafusion/common/src/utils/mod.rs	89.47%	0 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #26092      +/-   ##
==========================================
- Coverage   82.72%   82.72%   -0.01%     
==========================================
  Files        1147     1147              
  Lines      448179   448194      +15     
  Branches   448179   448194      +15     
==========================================
+ Hits       370754   370757       +3     
- Misses      54895    54902       +7     
- Partials    22530    22535       +5     

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