Refactor the functions to make it clear what they do:
copy_memory_to_image -> gfx_or_compute_copy_memory_to_image
copy_image_to_memory -> compute_copy_image_to_memory
copy_image -> gfx_or_compute_copy_image
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/37775>