Move test helper binaries #7104

Job	Run time
cross-i386	57s
test (ubuntu-20.04, 1.22.x, rootless, -race)	7m 28s
test (ubuntu-20.04, 1.22.x, rootless)	6m 44s
test (ubuntu-20.04, 1.22.x, -race)	7m 35s
test (ubuntu-20.04, 1.22.x)	7m 19s
test (ubuntu-20.04, 1.23.x, rootless, -race)	7m 16s
test (ubuntu-20.04, 1.23.x, rootless)	7m 2s
test (ubuntu-20.04, 1.23.x, -race)	7m 51s
test (ubuntu-20.04, 1.23.x)	7m 12s
test (ubuntu-20.04, 1.23.x, criu-dev)	7m 53s
test (ubuntu-24.04, 1.22.x, rootless, -race)	9m 32s
test (ubuntu-24.04, 1.22.x, rootless)	9m 22s
test (ubuntu-24.04, 1.22.x, -race)	7m 37s
test (ubuntu-24.04, 1.22.x)	7m 0s
test (ubuntu-24.04, 1.23.x, rootless, -race)	9m 54s
test (ubuntu-24.04, 1.23.x, rootless)	9m 37s
test (ubuntu-24.04, 1.23.x, -race)	7m 59s
test (ubuntu-24.04, 1.23.x)	7m 23s
test (ubuntu-24.04, 1.23.x, criu-dev)	7m 53s
test (actuated-arm64-6cpu-8gb, 1.23.x, rootless)	11m 30s
test (actuated-arm64-6cpu-8gb, 1.23.x)	7m 47s
all-done	1s
	2h 42m 52s

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