shader_recompiler: Improvements to array and cube handling.

[squidbus]

Enhances handling of array and cube images:

• Image sharps may have an array type, but in the actual shader the image is accessed with the array flag not set. In this case we should override the image to the proper non-array variant and avoid indexing as an array.
  • Fixes missing rendering in CUSA28193. Multiple shaders would have a 2D texture array bound but address it as a single layer, with the register used for the array index being invalid.
• Handles array flag for all MIMG instructions instead of just sampling instructions.
• Converts cubes to 2D arrays. This helps deal with cases where layers are not a multiple of 6 for whatever reason, and also enables derivatives and offsets on cube images, which are not possible with Vulkan cube images.

[squidbus]

Fixed a cube array crash, so no longer draft.

[StevenMiller123]

Improves Final Fantasy XV Episode Duscae (previously crashed on [Debug] <Critical> resource_tracking_pass.cpp:operator():570: Assertion Failed!, now crashes on [Debug] <Critical> tile_manager.cpp:operator():262: Assertion Failed!)
PR log.txt
main log.txt

[DanielSvoboda]

This also makes it possible to see in the games Elden Rind and SONIC X SHADOW GENERATIONS, as currently everything is black.