hack: Add explicit containerd feature to daemon.json

While it's still turned off by default, it's easier to just flip the
`false` to `true` inside the devcontainer.

Signed-off-by: Paweł Gronowski <pawel.gronowski@docker.com>

hack/dockerfile/etc/docker/daemon.json

@@ -3,5 +3,8 @@
 		"crun": {
 			"path": "/usr/local/bin/crun"
 		}
+	},
+	"features": {
+		"containerd-snapshotter": false
 	}
 }