Generalized fast subgroup checks and cofactor clearing for all pairing-friendly curves

[mratsim]

Probably also relevant for the hash-to-curve repo:

• Co-factor clearing and subgroup membership testing on pairing-friendly curves
  Youssef El Housni, Aurore Guillevic, and Thomas Piellard
  https://eprint.iacr.org/2022/352.pdf

extends fast subgroup checks to all pairing-friendly curves including BN and BW curves.