Cubemapper tests
Remove all ggx code for now & just copy directly to cubemap array
TextureCube with mipmaps and arrays and mipmaps
Move texture logic from cubemapper to c#
Stub for cubemapper_cs, will calculate both GGX and spherical harmonics all in GPU
Handle all array index stuff in cubemapper
Allow for single sliced cubemap array, needed to be able to render an independent texture in the renderer since it expects a TextureCubeArray, also allow TSPEC_CUBE_CAN_SAMPLE_AS_ARRAY if we want UAV
Also fix a problem where CTextureManagerVulkan::GetImageView wouldn't work with a cubemap array as a rwtexture2darray in compute shaders
Fix cube orientation when copying, do texture per envmap probe instead of a singleton array, this will cause headaches with multiple envmaps intersecting but makes it much simpler
GGX filtering
Don't bother with writing cubemap normalization right now (in fact disable it for now!), reuse previous mip so that we have more quality with less samples
Assert isn't valid anymore in ComputeImageViews since we can pass a cube array
Do cubemapper processing of all faces at once without using intermediary copies, 4-8x speedup (~17ms > ~2.5ms), still needs to be faster
https://i.imgur.com/b61mX1Y.png
Rendersystemvulkan: Alllow binding specific cubemap [ & arrays ] mips if UAV