arrow

GH-37222: [Docs][MATLAB] Rename `arrow.recordbatch` (all lowercase) to `arrow.recordBatch` (camelCase) (#37223)

### Rationale for this change

As @ kou suggested in https://github.com/apache/arrow/pull/37215#discussion_r1296559210, it makes sense to rename `arrow.recordbatch` (all lowercase) to `arrow.recordBatch` (camelCase).

`recordBatch` is the first "two-word" function in the top-level `arrow.*` package, so it makes sense to establish a clear camelCase standard for "multi-word" functions in the MATLAB interface at this point.

One part of the rationale motivating this change is that other language bindings follow a similar pattern (e.g. `pyarrow.record_batch` instead of `pyarrow.recordbatch`).

### What changes are included in this PR?

1. Renamed `arrow.recordbatch` (all lowercase) to `arrow.recordBatch` (camelCase).
2. Updated documentation and tests to reflect `arrow.recordbatch` being renamed to `arrow.recordBatch`.

### Are these changes tested?

Yes.

1. All existing MATLAB tests have been updated to use the new name `arrow.recordbatch` and are passing on my Debian 11 machine.

### Are there any user-facing changes?

Yes.

**This PR includes breaking changes to public APIs.**

The public facing API `arrow.recordbatch` has been renamed to `arrow.recordBatch`. Since the MATLAB interface is still "pre 1.0", we don't expect this change to have a significant impact.

### Notes

1. Thank you @ sgilmore10 for your help with this pull request!
* Closes: #37222

Lead-authored-by: Kevin Gurney <kgurney@mathworks.com>
Co-authored-by: Sarah Gilmore <sgilmore@mathworks.com>
Signed-off-by: Kevin Gurney <kgurney@mathworks.com>