Add support for mpi.conf templating #542

Job	Run time
Checks	48s
Build Rocky Linux 9 container image	23s
Molecule (rockylinux/rockylinux:8, test2)	6m 37s
Molecule (rockylinux/rockylinux:8, test3)	6m 45s
Molecule (rockylinux/rockylinux:8, test1)	5m 59s
Molecule (rockylinux/rockylinux:8, test1b)	6m 5s
Molecule (rockylinux/rockylinux:8, test1c)	6m 6s
Molecule (rockylinux/rockylinux:8, test11)	5m 53s
Molecule (rockylinux/rockylinux:8, test10)	6m 32s
Molecule (localhost/rocky9systemd, test1b)	13m 39s
Molecule (rockylinux/rockylinux:8, test9)	5m 48s
Molecule (rockylinux/rockylinux:8, test6)	2m 1s
Molecule (localhost/rocky9systemd, test1c)	14m 44s
Molecule (rockylinux/rockylinux:8, test12)	6m 21s
Molecule (rockylinux/rockylinux:8, test8)	6m 42s
Molecule (localhost/rocky9systemd, test1)	14m 1s
Molecule (localhost/rocky9systemd, test2)	14m 13s
Molecule (localhost/rocky9systemd, test4)	14m 11s
Molecule (rockylinux/rockylinux:8, test13)	6m 42s
Molecule (localhost/rocky9systemd, test6)	1m 59s
Molecule (localhost/rocky9systemd, test12)	13m 55s
Molecule (localhost/rocky9systemd, test8)	14m 35s
Molecule (localhost/rocky9systemd, test10)	15m 4s
Molecule (localhost/rocky9systemd, test13)	14m 24s
Molecule (localhost/rocky9systemd, test9)	13m 34s
Molecule (localhost/rocky9systemd, test3)	14m 18s
Molecule (localhost/rocky9systemd, test11)	13m 54s
	4h 5m 13s

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