Add support for mpi.conf templating #537

Job	Run time
Checks	46s
Build Rocky Linux 9 container image	28s
Molecule (rockylinux/rockylinux:8, test3)	6m 39s
Molecule (rockylinux/rockylinux:8, test9)	5m 54s
Molecule (rockylinux/rockylinux:8, test1b)	6m 3s
Molecule (rockylinux/rockylinux:8, test1)	6m 30s
Molecule (rockylinux/rockylinux:8, test13)	6m 30s
Molecule (rockylinux/rockylinux:8, test6)	2m 9s
Molecule (rockylinux/rockylinux:8, test1c)	5m 58s
Molecule (rockylinux/rockylinux:8, test10)	6m 7s
Molecule (rockylinux/rockylinux:8, test12)	5m 56s
Molecule (rockylinux/rockylinux:8, test2)	6m 25s
Molecule (rockylinux/rockylinux:8, test11)	6m 5s
Molecule (localhost/rocky9systemd, test1c)	13m 55s
Molecule (localhost/rocky9systemd, test1)	13m 58s
Molecule (localhost/rocky9systemd, test3)	14m 29s
Molecule (localhost/rocky9systemd, test1b)	14m 6s
Molecule (localhost/rocky9systemd, test2)	14m 22s
Molecule (localhost/rocky9systemd, test8)	14m 40s
Molecule (localhost/rocky9systemd, test10)	14m 14s
Molecule (rockylinux/rockylinux:8, test8)	6m 35s
Molecule (localhost/rocky9systemd, test4)	14m 41s
Molecule (localhost/rocky9systemd, test6)	2m 3s
Molecule (localhost/rocky9systemd, test9)	13m 57s
Molecule (localhost/rocky9systemd, test12)	13m 55s
Molecule (localhost/rocky9systemd, test11)	13m 55s
Molecule (localhost/rocky9systemd, test13)	14m 19s
	4h 4m 39s

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