arrow

ARROW-14583: [C++] Handle empty chunked arrays in Take, empty datasets in GroupByNode

This fixes two issues:
- A crash in GroupByNode when no batches are processed
- A spurious error calling Take on a ChunkedArray with no chunks

Closes #11623 from lidavidm/arrow-14583

Authored-by: David Li <li.davidm96@gmail.com>
Signed-off-by: David Li <li.davidm96@gmail.com>