[draft] libct/configs: move cgroup stuff to libct/cg/configs #6980

Job	Run time
cross-i386	1m 32s
test (ubuntu-20.04, 1.22.x, rootless, -race)	7m 14s
test (ubuntu-20.04, 1.22.x, rootless)	7m 7s
test (ubuntu-20.04, 1.22.x, -race)	7m 54s
test (ubuntu-20.04, 1.22.x)	7m 7s
test (ubuntu-20.04, 1.23.x, rootless, -race)	7m 32s
test (ubuntu-20.04, 1.23.x, rootless)	7m 14s
test (ubuntu-20.04, 1.23.x, -race)	8m 5s
test (ubuntu-20.04, 1.23.x)	7m 18s
test (ubuntu-20.04, 1.23.x, criu-dev)	8m 9s
test (ubuntu-24.04, 1.22.x, rootless, -race)	9m 45s
test (ubuntu-24.04, 1.22.x, rootless)	9m 24s
test (ubuntu-24.04, 1.22.x, -race)	8m 4s
test (ubuntu-24.04, 1.22.x)	7m 20s
test (ubuntu-24.04, 1.23.x, rootless, -race)	9m 56s
test (ubuntu-24.04, 1.23.x, rootless)	9m 39s
test (ubuntu-24.04, 1.23.x, -race)	8m 14s
test (ubuntu-24.04, 1.23.x)	7m 28s
test (ubuntu-24.04, 1.23.x, criu-dev)	9m 17s
test (actuated-arm64-6cpu-8gb, 1.23.x, rootless)	11m 41s
test (actuated-arm64-6cpu-8gb, 1.23.x)	8m 22s
all-done	1s
	2h 48m 23s

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