Add bootc reverse dependency CI workflow #530

Job	Run time
build (bls, rawhide)	7m 27s
build (bls, fedora)	8m 0s
build (uki, arch)	7m 51s
build (bls, rhel9)	7m 33s
build (bls, arch, ext4, none)	6m 0s
build (bls, fedora-compat)	6m 48s
build (uki, fedora)	7m 40s
build (unified, fedora)	7m 0s
build (unified-secureboot, fedora)	7m 38s
build (bls, arch)	6m 51s
build (bls, arch, xfs, none)	5m 22s
	1h 18m 10s

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