[clang] [lldb] [HLSL] Implement intangible AST type (PR #97362)

[Joshua Batista via cfe-commits]

bob80905 wrote:

Just an FYI, the syntax for adding a resource_class attribute as currently implemented looks like this:
`[[hlsl::resource_class(SRV)]]`
In your description, you may want to update this and other similar attributes.

https://github.com/llvm/llvm-project/pull/97362