arrow

ARROW-12677: [Python] Add a mask argument to pyarrow.StructArray.from_arrays

This allows the user to supply an optional `mask` when creating a struct array.

 * The mask requirements are pretty strict (must be a boolean arrow array without nulls) compared with some of the other functions (e.g. `array.mask` accepts a wide variety of inputs).  I think this should be ok since this use case is probably rarer and there are other plenty of existing ways to convert other datatypes to an arrow array.
 * ~~Unfortunately, StructArray::Make interprets the "null buffer" as more of a validity buffer (1 = valid, 0 = null).  This is the opposite of everywhere else a `mask` is used.  I was torn between inverting the input buffer to mimic the python API and passing through directly to the C interface for simplicity.  I chose the simpler option but could be convinced otherwise.~~ Per request, I now invert the mask to align with the python API.

Closes #10272 from westonpace/feature/ARROW-12677--python-add-a-mask-argument-to-pyarrow-structarra

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