Enable directly injecting motor failures using e.g. failure motor off -i 1

Only if SYS_FAILURE_EN is enabled and CA_FAILURE_MODE is > 0.

src/modules/commander/Commander.cpp

@@ -1956,6 +1956,7 @@ void Commander::run()
 			fd_status.fd_motor = _failure_detector.getStatusFlags().motor;
 			fd_status.imbalanced_prop_metric = _failure_detector.getImbalancedPropMetric();
 			fd_status.motor_failure_mask = _failure_detector.getMotorFailures();
+			fd_status.motor_stop_mask = _failure_detector.getMotorStopMask();
 			fd_status.timestamp = hrt_absolute_time();
 			_failure_detector_status_pub.publish(fd_status);
 		}