Merge pull request #4759 from daghack/add-lint-warnings #2754

Job	Run time
prepare	1s
test / prepare	2m 3s
test / run (containerd, ./frontend/dockerfile, integration)	4m 25s
test / run (containerd, ./frontend/dockerfile, dockerfile)	6m 26s
test / run (containerd-rootless, ./frontend/dockerfile, integration)	4m 27s
test / run (containerd-rootless, ./frontend/dockerfile, dockerfile)	6m 11s
test / run (containerd-1.6, ./frontend/dockerfile, integration)	4m 33s
test / run (containerd-1.6, ./frontend/dockerfile, dockerfile)	5m 47s
test / run (containerd-snapshotter-stargz, ./frontend/dockerfile, integration)	5m 24s
test / run (containerd-snapshotter-stargz, ./frontend/dockerfile, dockerfile)	12m 49s
test / run (oci, ./frontend/dockerfile, integration)	4m 11s
test / run (oci, ./frontend/dockerfile, dockerfile)	5m 34s
test / run (oci-rootless, ./frontend/dockerfile, integration)	4m 20s
test / run (oci-rootless, ./frontend/dockerfile, dockerfile)	5m 10s
test / run (oci-rootless-slirp4netns-detachnetns, ./frontend/dockerfile, integration)	4m 26s
test / run (oci-rootless-slirp4netns-detachnetns, ./frontend/dockerfile, dockerfile)	5m 21s
test / run (oci-snapshotter-stargz, ./frontend/dockerfile, integration)	4m 9s
test / run (oci-snapshotter-stargz, ./frontend/dockerfile, dockerfile)	5m 17s
image (mainline)	5m 9s
image (labs)	5m 27s
release	0s
	1h 41m 10s

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