Toggle for Terrain collision detection, to disable it

[birkskyum]

Suggested here by @Samarth1696

I would like to disable this feature for the use case for aircraft. Currently motion control works with jumpTo() in every frame. From what I have seen from my work of motion control that the camera goes under the terrain regardless of elevateCameraIfInsideTerrain is being called, this is because of jumpTo() I think. This feature would be correct for the use case for normal users but things might go wrong for aircraft motion control use case.

We can have a on and off switch for this feature where the user can choose between going under the terrain and not going under it. I know for the default UX no one wants to go under the Terrain but we have to find a solution for the aircraft use case.