Release ports on crc stop

`crc start` opens and uses ports which do not need to remain exposed after the machine has been stopped. This commit will ensure that the ports are unexposed on `crc stop`

pkg/crc/machine/stop.go

@@ -38,6 +38,10 @@ func (client *client) Stop() (state.State, error) {
 	if err != nil {
 		return state.Error, errors.Wrap(err, "Cannot get VM status")
 	}
+	// In case usermode networking make sure all the port bind on host should be released
+	if client.useVSock() {
+		return status, unexposePorts()
+	}
 	return status, nil
 }