[clang] [clang] Fix dangling false positives for conditional operators. (PR #120233)

[Shafik Yaghmour via cfe-commits]

https://github.com/shafik commented:

Please add more details to the summary, especially a note that there theoretically could be false negatives but it fixes the overall issue and the tradeoff good.

https://github.com/llvm/llvm-project/pull/120233