gh-36548: Support a few more Cython system packages
The usual stuff, for:
- cypari2
- cysignals
- fpylll
- memory_allocator
- pplpy
- primecountpy
### Dependencies
- https://github.com/sagemath/sage/pull/36482
URL: https://github.com/sagemath/sage/pull/36548
Reported by: Michael Orlitzky
Reviewer(s): Dima Pasechnik, Matthias Köppe, Michael Orlitzky
