Dropped support for Ubuntu Focal #491

Job	Run time
Lint	23s
Molecule test (amd64, max, rocky)	1m 40s
Molecule test (amd64, max, debian-max)	1m 37s
Molecule test (amd64, max, debian-min)	1m 34s
Molecule test (amd64, max, default)	1m 41s
Molecule test (amd64, max, ubuntu-min)	1m 32s
Molecule test (amd64, max, fedora)	2m 20s
Molecule test (amd64, max, opensuse)	2m 5s
Molecule test (arm, max, ubuntu-arm32v7)	4m 7s
Molecule test (arm64, max, ubuntu-arm64v8)	16m 18s
Molecule test (amd64, min, default)	1m 36s
Test (matrix)	1s
	34m 54s

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