[clang] [Clang][Driver] Link ASan into user binaries when the HIP runtime is ASan (PR #222402)

[Yaxun Liu via cfe-commits]

yxsamliu wrote:

This adds the same rpath twice: the new helper adds it first, then `addArchSpecificRPath()` adds it again later. The duplicate check only catches earlier entries, so the existing `arch-specific-libdir-rpath.c` test fails. Could we share the rpath handling so it is added only once?

https://github.com/llvm/llvm-project/pull/222402