[Bug] MAVLink Commands dont report support status

[hamishwillee]

Describe the bug

MAVLink commands are supposed to always ACK a response. PX4 returns no ACK for the following commands when sent to Gazebo in the current head revision of main.
This matters because the recipients are expecting a result - and will assume failure and resend if not.

I suspect that in some cases, such as the camera and gimbal, the commands are handled by the camera driver or gimbal manager when enabled. But if not enabled the command is swallowed without a response. Similar thing might be happening for payload etc.

'MAV_CMD_DO_FIGURE_EIGHT',
'MAV_CMD_NAV_DELAY',
'MAV_CMD_DO_DIGICAM_CONTROL',
'MAV_CMD_DO_MOUNT_CONFIGURE',
'MAV_CMD_DO_MOUNT_CONTROL',
'MAV_CMD_DO_SET_CAM_TRIGG_DIST',
'MAV_CMD_DO_GRIPPER',
'MAV_CMD_DO_SET_CAM_TRIGG_INTERVAL',
'MAV_CMD_DO_MOUNT_CONTROL_QUAT',
'MAV_CMD_PREFLIGHT_SET_SENSOR_OFFSETS',
'MAV_CMD_PREFLIGHT_UAVCAN',
'MAV_CMD_OBLIQUE_SURVEY',
'MAV_CMD_ACTUATOR_TEST',
'MAV_CMD_CONFIGURE_ACTUATOR',
'MAV_CMD_INJECT_FAILURE',
'MAV_CMD_START_RX_PAIR',
'MAV_CMD_REQUEST_CAMERA_INFORMATION',
'MAV_CMD_SET_CAMERA_MODE',
'MAV_CMD_SET_CAMERA_ZOOM',
'MAV_CMD_SET_CAMERA_FOCUS',
'MAV_CMD_DO_GIMBAL_MANAGER_PITCHYAW',
'MAV_CMD_DO_GIMBAL_MANAGER_CONFIGURE',
'MAV_CMD_DO_TRIGGER_CONTROL',
'MAV_CMD_DO_VTOL_TRANSITION',
'MAV_CMD_PAYLOAD_PREPARE_DEPLOY',
'MAV_CMD_PAYLOAD_CONTROL_DEPLOY',
'MAV_CMD_DO_WINCH'],

To Reproduce

I used a test script that fires every command in development.xml and below at SITL. This is not easily sharable because it is a work in progress fun test project based on libmav-python.

You could similarly test with pymavlink.

Expected behavior

A COMMAND_ACK with some command value should be sent in response to every command.

Screenshot / Media

No response

Flight Log

No response

Software Version

Gazebo SITL and PX4 main

Flight controller

No response

Vehicle type

Multicopter

How are the different components wired up (including port information)

No response

Additional context

No response

[hamishwillee]

FYI @julianoes YOu might want to look at the camera/gimbal ones of these.