libct/configs: move cgroup configs to libct/cgroups #7111

Job	Run time
cross-i386	1m 30s
test (ubuntu-20.04, 1.22.x, rootless, -race)	7m 26s
test (ubuntu-20.04, 1.22.x, rootless)	6m 54s
test (ubuntu-20.04, 1.22.x, -race)	7m 52s
test (ubuntu-20.04, 1.22.x)	7m 10s
test (ubuntu-20.04, 1.23.x, rootless, -race)	7m 23s
test (ubuntu-20.04, 1.23.x, rootless)	7m 23s
test (ubuntu-20.04, 1.23.x, -race)	8m 7s
test (ubuntu-20.04, 1.23.x)	7m 6s
test (ubuntu-20.04, 1.23.x, criu-dev)	8m 18s
test (ubuntu-24.04, 1.22.x, rootless, -race)	9m 48s
test (ubuntu-24.04, 1.22.x, rootless)	9m 9s
test (ubuntu-24.04, 1.22.x, -race)	8m 12s
test (ubuntu-24.04, 1.22.x)	7m 21s
test (ubuntu-24.04, 1.23.x, rootless, -race)	10m 9s
test (ubuntu-24.04, 1.23.x, rootless)	9m 24s
test (ubuntu-24.04, 1.23.x, -race)	7m 59s
test (ubuntu-24.04, 1.23.x)	7m 24s
test (ubuntu-24.04, 1.23.x, criu-dev)	7m 53s
test (actuated-arm64-6cpu-8gb, 1.23.x, rootless)	11m 31s
test (actuated-arm64-6cpu-8gb, 1.23.x)	8m 9s
all-done	1s
	2h 46m 9s

Provide feedback