devel/py-reedsolo: Allow build with Python 3.10+

• Regenerate creedsolo.c with Cython, which fixes build error with Python 3.10+

• Switched Nose to Pytest, for the nosetests issue [0]

[0]: https://github.com/nose-devs/nose/issues/1124

PR: 267882
Reported by: teodorsigaev@gmail.com
MFH: 2022Q4 (build fix)