Ignore location tracking mode based animations when the camera is transitioning

[LukasPaczos]

Fixes an unexpected behavior where zoomWhileTracking and tiltWhileTracking animations were ignored for the duration of the camera transition.

This could result in scenarios like:

1) set the camera tracking mode with a duration of 750ms
2) immediately call `zoomWhileTracking` with a duration of 1000ms

Zoom animation is ignored for 750ms and then resumes with a jump to 75% completion.

1) set the camera tracking mode with a duration of 750ms
2) immediately call `zoomWhileTracking` with a duration of 500ms

Zoom animation is completely ignored.

Changelog entry candidate:

Fixes an unexpected behavior that occurred while calling `zoomWhileTracking` and `tiltWhileTracking` animations during the `CameraMode` change transition. Those animations are now ignored and print appropriate warnings. [#15641](https://github.com/mapbox/mapbox-gl-native/pull/15641)

[tobrun]

you will need to rebase on 5254876 to make the new CI builds run