Merge pull request #47084 from AkihiroSuda/dockerd-rootless-setuptool… #448

Job	Run time
validate-dco / run	20s
build	1m 54s
test (dockerd, client, integration)	14m 18s
test (dockerd, cmd/buildctl, integration)	5m 47s
test (dockerd, solver, integration)	5m 43s
test (dockerd, frontend, integration)	5m 53s
test (dockerd, frontend/dockerfile, integration)	17m 44s
test (dockerd-containerd, client, integration)	15m 54s
test (dockerd-containerd, cmd/buildctl, integration)	5m 41s
test (dockerd-containerd, solver, integration)	5m 48s
test (dockerd-containerd, frontend, integration)	6m 3s
test (dockerd-containerd, frontend/dockerfile, integration)	19m 39s
	1h 44m 44s

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