RELEASES: add formal release policy for runc #7125

Job	Run time
cross-i386	1m 9s
test (ubuntu-20.04, 1.22.x, rootless, -race)	7m 7s
test (ubuntu-20.04, 1.22.x, rootless)	6m 55s
test (ubuntu-20.04, 1.22.x, -race)	7m 56s
test (ubuntu-20.04, 1.22.x)	6m 56s
test (ubuntu-20.04, 1.23.x, rootless, -race)	7m 33s
test (ubuntu-20.04, 1.23.x, rootless)	6m 52s
test (ubuntu-20.04, 1.23.x, -race)	7m 52s
test (ubuntu-20.04, 1.23.x)	7m 1s
test (ubuntu-20.04, 1.23.x, criu-dev)	7m 42s
test (ubuntu-24.04, 1.22.x, rootless, -race)	9m 59s
test (ubuntu-24.04, 1.22.x, rootless)	9m 14s
test (ubuntu-24.04, 1.22.x, -race)	8m 22s
test (ubuntu-24.04, 1.22.x)	7m 48s
test (ubuntu-24.04, 1.23.x, rootless, -race)	10m 11s
test (ubuntu-24.04, 1.23.x, rootless)	9m 52s
test (ubuntu-24.04, 1.23.x, -race)	7m 56s
test (ubuntu-24.04, 1.23.x)	7m 18s
test (ubuntu-24.04, 1.23.x, criu-dev)	8m 16s
test (actuated-arm64-6cpu-8gb, 1.23.x, rootless)	11m 38s
test (actuated-arm64-6cpu-8gb, 1.23.x)	8m 10s
all-done	1s
	2h 45m 48s

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