topic_listener: avoid code generation, use existing metadata at runtime

This reduces flash size for v5 by ~110KB, the topic listener now only adds
about 1.2KB.

src/drivers/gps/gps.cpp

@@ -1045,7 +1045,7 @@ GPS::print_status()
 		PX4_INFO("rate publication:\t\t%6.2f Hz", (double)_rate);
 		PX4_INFO("rate RTCM injection:\t%6.2f Hz", (double)_rate_rtcm_injection);
 
-		print_message(_report_gps_pos);
+		print_message(ORB_ID(sensor_gps), _report_gps_pos);
 	}
 
 	if (_instance == Instance::Main && _secondary_instance.load()) {