[llvm] [llvm] annotate interfaces in llvm/IR for DLL export (PR #141650)

[Saleem Abdulrasool via llvm-commits]

https://github.com/compnerd approved this pull request.

I think that we should address the limitation in IDS for llvm/include/llvm/IR/DerivedTypes.h. We can do that subsequently, I don't think that we need to hold up this change for that.

https://github.com/llvm/llvm-project/pull/141650