Starting with Python 3.12, passing a PyLong into Py_SIZE() triggers an
assertion. PyLong (and the whole C API) is transitioning to be more
opaque and expose fewer implementation details.
I'm mostly trying to make sure we have over-coverage for a couple of places that are being hit intermittently by our current unit tests, generating noisy codecov reports. If we make sure these places are hit always, we hopefully won't have codecov misreport lost/gained coverage for unrelated changes.
* Support converting BitMask types to int
* BitArray constructor accepts a Python long of arbitrary size
* DoubleBitMask (and QuadBitMask, by extension) supports Python long in constructor
* Support for pickling (except DoubleBitMask)
* All of them now properly define __bool__()
* More unit tests
Fixes#886
