- closes #8177

vmount: Store offset in radians and calculated scale factor in OutputConfig instead of raw parameters.

Adds MNT_DO_STAB for whether to stabilize by default.
Adds MNT_RANGE_{PITCH,ROLL,YAW} for the output range of each output channel in AUX mode (instead of hardcoded 360 degrees).
Adds MNT_OFF_{PITCH,ROLL,YAW} for adjusting the zero point of each output channel.

out of flash again...

When checking a mission, the takeoff altitude is being checked
against the waypoint acceptance radius to ensure the MAV being
clear from ground before heading to the next waypoint.
However, until now the _horizontal_ acceptance radius was being
used, instead of the altitude reference value.

Targets PX4/Firmware/#7379

This change updates a number of interfaces to use the new TECS implementation from the ECL library.

The TECS controller belongs really into the ECL (estimation & control library) where we have collected a number of vehicle control systems. It is being replaced by a new implementation of the algorithm, contributed by Paul Riseborough.

Instead of just checking whether the first waypoint is too far away from
home it makes sense to also check between waypoints.
This can prevent
- flyaways due to user errors, or
- catch the corner case where a takeoff waypoint is added to a mission
  and therefore the first waypoint is not too far away, however, the
  subsequent waypoints are still too far away.

Checking with 3Hz for new topics should be fast enough.

flight review now uses vehicle_status & manual_control_setpoint

to avoid dynamic memory allocations & frees (specifically in orb_exists)

If logger is started very early, orb_exists() will fail for a lot of
topics, they will be advertised within the next few seconds.
Logger already dynamically adds subscriptions during logging, but if we
do that before as well, we'll avoid any delays and having to subscribe
to a lot of topics all at once.

To keep track of the configured interval, we store it as negative file
descriptor, until we do the subscription.

This frees up a considerable amount of file descriptors in most use-cases.

Existing users of orb_exists:
- logger (dynamic subscribe to multi-instances)
- mavlink (orb subscription)
- sdlog2
- preflightcheck (check for home_position)
- wait_for_topic shell command (it's not used)
- orb_group_count() (sensors: dynamic sensor addition)

All use-cases benefit from the changed semantics: they are really only
interested if there is a publisher, not another subscriber.