Stop: Warn for stopping the containers instead error out

As of now if somehow crictl not able to stop all the containers
then we are erroring out and failed the stop command. With this
patch we just warn user in case it fails and carry on with vm
shutdown.

pkg/crc/machine/stop.go

@@ -19,7 +19,7 @@ func (client *client) Stop() (state.State, error) {
 		return state.Error, errors.Wrap(err, "Cannot load machine")
 	}
 	if err := stopAllContainers(host, client); err != nil {
-		return state.Error, err
+		logging.Warnf("Failed to stop all containers: %v\nProceeding with stop...", err)
 	}
 	logging.Info("Stopping the OpenShift cluster, this may take a few minutes...")
 	if err := host.Stop(); err != nil {