[llvm] Set shader analysis flag EnableRawAndStructuredBuffers for RawBuffer and StructuredBuffer resource types (PR #114449)

[Tex Riddell via llvm-commits]

https://github.com/tex3d requested changes to this pull request.

After some further analysis, I don't think we should set this flag in this compiler, unless/until we support `ps_4_0`/`ps_4_1` DXBC targets, where the flag is used in the DXBC instruction stream.  This is the only place this flag is used.

https://github.com/llvm/llvm-project/pull/114449