Make ArragAgg (not ordered or distinct) into a UDAF

[eejbyfeldt]

Which issue does this PR close?

Part of #8708

Closes #10999.

Rationale for this change

What changes are included in this PR?

Are these changes tested?

Existing tests.

Are there any user-facing changes?

This adds UDAF for ARRAY_AGG when it not disitinct or ordered. The distinct and ordered will be handled in future PRs.

[alamb]

Thanks @eejbyfeldt and @jayzhan211 -- this PR seems to be failing CI so I am marking it as a draft until that gets sorted out. I am working on reducing the review backlog