[wgpu-hal] With shader passthrough use given "binding" indices in Vulkan instead of incrementing from 0 #9326
Description
Is your feature request related to a problem? Please describe.
When using SPIR-V passthrough it can be very confusing when creating bind group layouts that the binding indices you pass in with BindGroupLayoutEntry, won't be the same internally in Vulkan, causing mismatches.
Describe the solution you'd like
Whenever the pipeline layout is given explicitly, use the given binding indices instead of using next_binding
Describe alternatives you've considered
Rewriting the SPIRV words to match the actual bindings created by wgpu, which isn't ideal.