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MINOR: [Docs][C++] Improve Input Shapes section of Compute doc (#35720)

1.  The function that only takes arrays should be `array_sort_indices`, not `sort_indices`.
2. IMO The word `either` implies that `array_sort_indices` also accepts chunked arrays but in fact it doesn't. So I changed `either` to `particular input types`.
3. There are no mention of two dimensional data types, i.e. RecordBatch and Table, throughout the Input Shapes section, which I feel like is a miss. So I added `sort_indices` as an example for them.

Authored-by: Jin Shang <shangjin1997@gmail.com>
Signed-off-by: Antoine Pitrou <antoine@python.org>