[clang] [llvm] IR: Add module level attribution language-standard (PR #93159)

[Matt Arsenault via llvm-commits]

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

You cannot encode language standards in this. We should simply have different operations that provide the range of semantics and not make the IR modal 

https://github.com/llvm/llvm-project/pull/93159