PETSc 3.19.3 is available on Owens and Pitzer

PETSc 3.19.3 has been installed with both gnu and intel compilers on both Owens and Pitzer.  Usage is via the module petsc/3.19.3.  For help loading, use the command: "module spider petsc/3.19.3".  That command also emits information on usage and installation details.