arrow

GH-43183: [C++] Add `date{32,64}` to `date{32,64}` cast (#43192)



### Rationale for this change

This one seems to be missing, see https://github.com/apache/arrow/issues/43183

### What changes are included in this PR?

### Are these changes tested?

I'm not sure what the best place is to test this, please advise

### Are there any user-facing changes?

* GitHub Issue: #43183

Lead-authored-by: Fokko <fokko@apache.org>
Co-authored-by: Fokko Driesprong <fokko@apache.org>
Co-authored-by: Hyunseok Seo <hsseo0501@gmail.com>
Signed-off-by: Antoine Pitrou <antoine@python.org>