Atomic ops on images with Unknown type will cause SPIR-V validation failure,
and assertion failure in Mesa debug builds. D3D12 allows atomics on typed
buffers, and this requires a distinction to be made between UAV reads and
atomic ops.
--
v2: vkd3d-shader: Introduce DESCRIPTOR_INFO_FLAG_UAV_ATOMICS and always declare UAV images with known type for atomic ops.
tests: Test a typed UAV buffer in test_atomic_instructions().
https://gitlab.winehq.org/wine/vkd3d/-/merge_requests/49