Upgrade to containerd 2 #5798

Job	Run time
sandbox-build (linux/amd64)	7m 9s
build (windows/amd64)	2m 0s
sandbox-build (linux/arm64)	6m 39s
build (freebsd/amd64)	1m 53s
test-freebsd-amd64	2m 52s
test-windows-amd64 (containerd, ./client)	7m 45s
test-windows-amd64 (containerd, ./cmd/buildctl)	3m 38s
test-windows-amd64 (containerd, ./worker/containerd)	2m 41s
test-windows-amd64 (containerd, ./solver)	2m 45s
test-windows-amd64 (containerd, ./frontend)	2m 44s
test-windows-amd64 (containerd, ./frontend/dockerfile)	41m 9s
test-windows-amd64 (./..., 1)	5m 5s
	1h 26m 20s

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