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

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llvmbot wrote:

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Failed to cherry-pick: 136f2ba2a7bca015ef831c91fb0db5e5e31b7632

https://github.com/llvm/llvm-project/actions/runs/15067591667

Please manually backport the fix and push it to your github fork.  Once this is done, please create a [pull request](https://github.com/llvm/llvm-project/compare)

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