drop runc-dmz solution according to overlay solution #6854

Job	Run time
cross-i386	1m 13s
test (ubuntu-20.04, 1.22.x, rootless, -race)	7m 14s
test (ubuntu-20.04, 1.22.x, rootless)	7m 5s
test (ubuntu-20.04, 1.22.x, -race)	7m 37s
test (ubuntu-20.04, 1.22.x)	6m 49s
test (ubuntu-20.04, 1.23.x, rootless, -race)	7m 21s
test (ubuntu-20.04, 1.23.x, rootless)	7m 4s
test (ubuntu-20.04, 1.23.x, -race)	7m 54s
test (ubuntu-20.04, 1.23.x)	7m 27s
test (ubuntu-20.04, 1.23.x, criu-dev)	8m 31s
test (ubuntu-24.04, 1.22.x, rootless, -race)	9m 30s
test (ubuntu-24.04, 1.22.x, rootless)	9m 5s
test (ubuntu-24.04, 1.22.x, -race)	7m 39s
test (ubuntu-24.04, 1.22.x)	6m 45s
test (ubuntu-24.04, 1.23.x, rootless, -race)	9m 45s
test (ubuntu-24.04, 1.23.x, rootless)	9m 46s
test (ubuntu-24.04, 1.23.x, -race)	7m 54s
test (ubuntu-24.04, 1.23.x)	7m 22s
test (ubuntu-24.04, 1.23.x, criu-dev)	7m 52s
test (actuated-arm64-6cpu-8gb, 1.23.x, rootless)	11m 41s
test (actuated-arm64-6cpu-8gb, 1.23.x)	7m 51s
all-done	1s
	2h 43m 26s

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