Try to map `spirv-val` output to Rust code

I just got an error that looks like this:

error: error:0:0 - OpInBoundsAccessChain result type (OpTypeStruct) does not match the type that results from indexing into the base <id> (OpTypeArray).
         %2764 = OpInBoundsAccessChain %_ptr_Function__struct_33 %2763 %uint_0
  |
  = note: spirv-val failed
  = note: module `.../spirv-unknown-vulkan1.2/debug/deps/....spv`

Unfortunately, the output isn't all that helpful, don't know how to debug it except commenting-out pieces of code until the error goes away. However, I do have a suspicion that _ptr_Function__struct_33 might be something that codegen controls, which in turn might mean ability to translate it back to something like the name of the data structure or file and line of code.

Also maybe debug builds could use something more descriptive than struct_33 to help with debugging, like a mangling scheme.

I'm compiling with these options:

let backend = cargo_gpu::Install::from_shader_crate(shader_crate.clone()).run()?;

let spirv_builder = backend
    .to_spirv_builder(shader_crate, "spirv-unknown-vulkan1.2")
    .print_metadata(MetadataPrintout::DependencyOnly)
    .spirv_metadata(SpirvMetadata::NameVariables)
    .release(false);

Review the cargo_gpu::Install flow and the to_spirv_builder(...).spirv_metadata(SpirvMetadata::NameVariables) configuration, then inspect how the emitted spirv-val diagnostics expose _ptr_Function__struct_33. Define a concrete mapping or naming behavior and verify it against the shown OpInBoundsAccessChain failure; the issue is done when generated diagnostics identify relevant Rust source context or provide more descriptive debug names.