FlightTaskOrbit: parameterize hardcoded maximum radius

[MaEtUgR]

Describe problem solved by this pull request

For safety/dummy proofing reasons the radius of a multicopter orbit is limited. There were use cases recently that required more than 100m orbit radius limit and that's why I increased the hardcoded limit in #19362 The ground station does not know what the limit is but allows the user to plan an arbitrary radius which then gets rejected by the autopilot.

Describe your solution

For these reasons, I made the maximum radius configurable.

Describe possible alternatives

Alternatively we could remove the maximum radius limit altogether.
- That would allow an infinite unreasonable radius
+ For dummy proofing 1 km radius is already quite large
+ Slightly less complexity and code

Test data / coverage

This was simulation tested separately and together with client ground station code to limit the radius correctly.