Consolidate `VoxelBoundsCollection` and `ClippingPlaneCollection`

[jjhembd]

VoxelBoundsCollection is very similar to ClippingPlaneCollection, with a few differences including:

• VoxelBoundsCollection assumes floating point textures are supported
• ClippingPlaneCollection stores the planes in the texture in model coordinates, and uploads a transform to be applied on the GPU. VoxelBoundCollection was reworked to store the planes in eye coordinates, for better precision when applied to global-scale models (see Use eye coordinates for voxel raymarching #12933).

The amount of code duplication adds something of a maintenance burden. We should consider refactoring these as one class.