Add initial support for Zen5 and claritfy Zen3 vs Zen5 CPU family

[bigzachattack]

Summary: This diff includes changes in hbt to support adding Zen5 CPUs.

CpuFamily::AMD has been renamed CpuFamily::AMDZEN3 and adds CpuFamily::AMDZEN5, since AMD changes families more often than Intel.

Differential Revision: D62447334