libct/cap: switch to moby/sys/capability, lazy init #7053

Job	Run time
cross-i386	1m 37s
test (ubuntu-20.04, 1.22.x, rootless, -race)	7m 25s
test (ubuntu-20.04, 1.22.x, rootless)	7m 9s
test (ubuntu-20.04, 1.22.x, -race)	7m 48s
test (ubuntu-20.04, 1.22.x)	7m 13s
test (ubuntu-20.04, 1.23.x, rootless, -race)	7m 36s
test (ubuntu-20.04, 1.23.x, rootless)	7m 11s
test (ubuntu-20.04, 1.23.x, -race)	7m 59s
test (ubuntu-20.04, 1.23.x)	7m 21s
test (ubuntu-20.04, 1.23.x, criu-dev)	7m 55s
test (ubuntu-24.04, 1.22.x, rootless, -race)	9m 46s
test (ubuntu-24.04, 1.22.x, rootless)	9m 33s
test (ubuntu-24.04, 1.22.x, -race)	8m 21s
test (ubuntu-24.04, 1.22.x)	7m 29s
test (ubuntu-24.04, 1.23.x, rootless, -race)	9m 49s
test (ubuntu-24.04, 1.23.x, rootless)	9m 36s
test (ubuntu-24.04, 1.23.x, -race)	8m 7s
test (ubuntu-24.04, 1.23.x)	7m 17s
test (ubuntu-24.04, 1.23.x, criu-dev)	7m 48s
test (actuated-arm64-6cpu-8gb, 1.23.x, rootless)	11m 47s
test (actuated-arm64-6cpu-8gb, 1.23.x)	8m 21s
all-done	1s
	2h 47m 9s

Provide feedback