Camera Animation: GUI improvements

Modify camera track creation and edition.

This adds some buttons/options in the KeyFrame editors, leading to:

• a reduction of the number of camera mode, while keeping features.
• a reduction of clicks to setup camera in interpolation mode

Camera creation

Keep only choice that match the `Mode` property of the `CameraAnimationCue`

Interpolate cameras GUI

"Interpolate cameras" has a "spline" checkbox, and utilities to use current camera.

Path mode GUI

Orbit creation is now an option inside "follow path" mode.

related issues: #18125 #21458

also closes #9326 (closed)