[clang] [llvm] [HLSL] Implement '__builtin_hlsl_is_intangible' type trait (PR #104544)

[Chris B via cfe-commits]

https://github.com/llvm-beanz requested changes to this pull request.

I left an inline comment about this, but rather than keeping a side map in the SemaHLSL object we should take a bit in the RecordDecl bitfield to signify if the type is intangible.

https://github.com/llvm/llvm-project/pull/104544