[clang] [HLSL] (DRAFT) Another way to implement #92071: [HLSL] Default linkage of HLSL function should be internal (PR #95331)

[Greg Roth via cfe-commits]

https://github.com/pow2clk commented:

Linking functions as internal should mean that they won't be included in the final output if they don't have any calls. A test that verifies that behavior would be useful.

Even if they are called, a test that verifies that they have the "internal" attribute applied would be useful too. 

https://github.com/llvm/llvm-project/pull/95331