Perform image processing at 32bpp for HDR/EXR/DDS outputs. Closes #1103
Perform image processing at 32bpp for HDR/EXR/DDS outputs. Closes #1103

* When flattening array slices or remapping to a cube cruciform, we can remap to
  RGBA32 when the output format is itself greater than 8bpp, to ensure we don't
  lose quality before output.

Zorro666/renderdoc,TurtleRockStudios/renderdoc_public,Zorro666/renderdoc,Zorro666/renderdoc,TurtleRockStudios/renderdoc_public,baldurk/renderdoc,baldurk/renderdoc,googlestadia/renderdoc,Zorro666/renderdoc,Zorro666/renderdoc,TurtleRockStudios/renderdoc_public,baldurk/renderdoc,Zorro666/renderdoc,baldurk/renderdoc,baldurk/renderdoc,googlestadia/renderdoc,TurtleRockStudios/renderdoc_public,TurtleRockStudios/renderdoc_public,googlestadia/renderdoc,googlestadia/renderdoc,TurtleRockStudios/renderdoc_public,googlestadia/renderdoc,baldurk/renderdoc,googlestadia/renderdoc