net/mpich: Upgrade mpich from 4.2.1 to 4.2.2

  - Remove default slurm dependency and make it an option (Bug 279777)
  - Remove HYDRA dependency on torque (not needed)
  - Revert removal of HYDRA option

PR:		280184, 279777
Approved by:	 Laurent Chardon <laurent.chardon@gmail.com> (maintainer)