shader: evaluate handle programs for image and texture buffer descriptors

561f87abec only gave TextureDescriptor a handle_program. Image load/store/atomics
and texture/image buffers whose handle comes from a storage buffer still got the
placeholder constant buffer address (index 0, offset 0), so the pipelines read
cbuf 0 word 0 as the handle (and asserted if cbuf 0 was unbound). Add
handle_program to TextureBufferDescriptor, ImageBufferDescriptor and
ImageDescriptor, compare it when merging, and let all four pipelines evaluate it
for every descriptor kind instead of only TextureDescriptor.

ImageQueryDimensions on such a handle was always declared Color2D, so array,
cube and 3D views got a 2D declaration. The instruction carries no type, so take
it from another instruction using the same handle program, falling back to
Color2D when there is none.

Follow-up to 561f87abec. The OpenGL pipeline edits are the same change as the
Vulkan ones but were not compiled here.

Assisted-by: Claude Sonnet 5.5 (implementation and commit message)

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