Rework landing gear logic

- remove deprecated actuator_controls[INDEX_LANDING_GEAR]
- remove dead code in mc rate controller that used to prevent it from being retracted
on the ground (anyway had no effect as it only affected the actuator_control[LANDING_GEAR]
which wasn't sent to the control allocation)
- for VTOLs handle deployment/retraction of landing gear in AUTO  as a MC (retract if
more than 2m above ground, deploy if WP is a landing WP), plus additionally when transition
flight task is called (ALTITUDE mode and higher)
- for FW in AUTO: add logic in FW Position Controller, depending on waypoint type mainly
- manual landing gear settings always come through (a manual command overrides a previous
auto command, and vice-versa)

Signed-off-by: Silvan Fuhrer <silvan@auterion.com>

src/modules/logger/logged_topics.cpp

@@ -79,6 +79,7 @@ void LoggedTopics::add_default_topics()
 	add_optional_topic("internal_combustion_engine_status", 10);
 	add_optional_topic("iridiumsbd_status", 1000);
 	add_optional_topic("irlock_report", 1000);
+	add_optional_topic("landing_gear", 200);
 	add_optional_topic("landing_gear_wheel", 100);
 	add_optional_topic("landing_target_pose", 1000);
 	add_optional_topic("launch_detection_status", 200);