Native `collect_set(struct)` aggregate crashes on spill emit

[hsiang-c]

Describe the bug

Native collect_set / collect_list over a struct with a non-nullable nested field aborts in GroupedHashAggregateStream::emit during spill:

ArrowError: column types must match schema types,
  expected List(Struct("colA": Boolean, ...))
  but found  List(Struct("colA": non-null Boolean, ...))  at column index 1

Call Stack: GroupedHashAggregateStream::emit (row_hash.rs:1134) ← spill ← try_update_memory_reservation. Fires only on the spill path.

Dependencies versions: DataFusion 54.1.0 / arrow 58.4.0.

Steps to reproduce

No response

Expected behavior

No response

Additional context

No response

[alamb]

This doesn't look like a regression (used to work but now doesn't) to me

The report above suggests that this is a bug with existing versions

• Dependencies versions: DataFusion 54.1.0 / arrow 58.4.0.

[alamb]

Confirmed that the upstream issue is also present on 54.1.0

• GroupedHashAggregateStream::emit throws ArrowError: column types must match schema types datafusion#24069