ci/cirrus: disable selinux-dmz kludge for centos-stream-8 #5358

Job	Run time
cross-i386	1m 18s
cross-i386 (runc_nodmz)	1m 28s
test (ubuntu-20.04, 1.20.x, rootless, -race)	5m 32s
test (ubuntu-20.04, 1.20.x, rootless)	4m 50s
test (ubuntu-20.04, 1.20.x, -race)	5m 48s
test (ubuntu-20.04, 1.20.x)	4m 59s
test (ubuntu-20.04, 1.21.x, rootless, -race)	9m 31s
test (ubuntu-20.04, 1.21.x, rootless)	5m 6s
test (ubuntu-20.04, 1.21.x, -race)	5m 41s
test (ubuntu-20.04, 1.21.x)	5m 6s
test (ubuntu-20.04, 1.21.x, criu-dev)	5m 26s
test (ubuntu-22.04, 1.20.x, rootless, -race)	8m 45s
test (ubuntu-22.04, 1.20.x, rootless, -race, runc_nodmz)	10m 48s
test (ubuntu-22.04, 1.20.x, rootless)	10m 32s
test (ubuntu-22.04, 1.20.x, rootless, runc_nodmz)	12m 40s
test (ubuntu-22.04, 1.20.x, -race)	8m 44s
test (ubuntu-22.04, 1.20.x, -race, runc_nodmz)	9m 40s
test (ubuntu-22.04, 1.20.x)	6m 18s
test (ubuntu-22.04, 1.20.x, runc_nodmz)	6m 12s
test (ubuntu-22.04, 1.21.x, rootless, -race)	8m 55s
test (ubuntu-22.04, 1.21.x, rootless, -race, runc_nodmz)	13m 47s
test (ubuntu-22.04, 1.21.x, rootless)	10m 42s
test (ubuntu-22.04, 1.21.x, rootless, runc_nodmz)	8m 23s
test (ubuntu-22.04, 1.21.x, -race)	6m 42s
test (ubuntu-22.04, 1.21.x, -race, runc_nodmz)	10m 25s
test (ubuntu-22.04, 1.21.x)	7m 58s
test (ubuntu-22.04, 1.21.x, runc_nodmz)	6m 11s
test (ubuntu-22.04, 1.21.x, criu-dev)	6m 39s
	3h 28m 6s

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