[SPIR-V] SV_ShadingRate as pixel shader input generates invalid SPIR-V

[lordOznek]

Description
Having SV_ShadingRate semantic value as pixel shader input generates invalid SPIR-V with the following error:

[VUID-StandaloneSpirv-None-04667] In Vulkan, OpTypeStruct must not contain an opaque type. %SamplerStateProvider__Resources = OpTypeStruct %type_sampler %type_sampler %type_sampler %type_sampler %type_sampler %type_sampler %type_sampler %type_sampler %type_sampler %type_sampler

Note: the same code is working for DX12.

Steps to Reproduce
Using dxcompiler.dll on 1.08.2407.07 (July 2024) with the following arguments:
-EMainPS -Tps_6_4 -Gfp -HV 2018 -Zi -Zss -fspv-debug=file -fspv-debug=source -fspv-debug=line -Od -Wno-effects-syntax -Qstrip_debug -Qstrip_rootsignature -spirv -fvk-use-dx-layout -fvk-use-dx-position-w -fspv-target-env=vulkan1.1

Here the godbolt link with a stripped sample code: https://godbolt.org/z/rjrfjzPY5

Actual Behavior
Should output valid Spirv.

Environment

• DXC version dxcompiler.dll on 1.08.2407.07 (July 2024)
• Host Operating System Édition
  Windows 10 Entreprise
  Version 22H2
  Installé le ‎09/‎02/‎2023
  Build du système d’exploitation 19045.5011
  Expérience Windows Feature Experience Pack 1000.19060.1000.0