[clang] [clang-cl] [Sema] Support MSVC non-const lvalue to user-defined temporary reference (PR #99833)

[Reid Kleckner via cfe-commits]

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

I think this looks good, but I would appreciate another reviewer looking at the patch.

https://github.com/llvm/llvm-project/pull/99833