[HLSL] Add appropriate transform/validation of `tbaa` metadata kind

[bob80905]

The MD_tbaa metadata has a backwards incompatible representation, with respect to the LLVM 3.7 representation DXIL uses.

This issue is resolved when we continue to emit the DXIL compatible version of the metadata.

Note: DXC vs upstream llvm representations.

AC:

• Transform MD_tbaa metadata nodes into DXIL compatible dx.tbaa metadata nodes (DXILTranslateMetadata)
• Update the allow-list in DXILTranslateMetadata
• Add DXC equivalent validations for dx.tbaa
• Update the bitcode writer to replace dx.tbaa back to MD_tbaa
• Add applicable testing

[inbelic]

This issue is currently blocked on IHV feedback of if this is required/used, and/or, if a potential DXIL consumer optimization arises in the future that would require this metadata information.

For any future dev work, here is a partial implementation that could be used to start from: https://gist.github.com/inbelic/59c59138698a011a8c1cd94de0870b17