Merge pull request #5353 from crazy-max/ci-freebsd-on-ubuntu #62

Job	Run time
build (windows/amd64)	2m 30s
build (freebsd/amd64)	2m 18s
test-freebsd-amd64	3m 7s
test-windows-amd64 (containerd, ./client)	4m 54s
test-windows-amd64 (containerd, ./cmd/buildctl)	3m 23s
test-windows-amd64 (containerd, ./worker/containerd)	2m 16s
test-windows-amd64 (containerd, ./solver)	2m 14s
test-windows-amd64 (containerd, ./frontend)	2m 36s
test-windows-amd64 (containerd, ./frontend/dockerfile)	29m 8s
test-windows-amd64 (./..., 1)	12m 25s
	1h 4m 51s

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