[clang] [Clang][AST] Fix HandleLValueBase to deal with references (PR #140105)

[A. Jiang via cfe-commits]

frederick-vs-ja wrote:

> @frederick-vs-ja Were you able to create a PR for this backport?

I created #140246 for this backport, and that PR is already merged.

https://github.com/llvm/llvm-project/pull/140105