[clang] [Sema] Keep attribute lists in the order the attributes were parsed (PR #162714)

[Saleem Abdulrasool via cfe-commits]

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

I do still think that the altered phrasing would be a much better diagnostic, but this change now feels like it is actually cleaning up the code base a good deal. Sorry about the multiple iterations, I do appreciate the final result.

https://github.com/llvm/llvm-project/pull/162714