[clang] [analyzer] Workaround for slowdown spikes (unintended scope increase) (PR #136720)

[Donát Nagy via cfe-commits]

NagyDonat wrote:

This is not an automatic "every project is affected" slowdown, but on smaller outlier projects like tmux the runtime may double, so I'd guess that it's reasonable to backport this commit (although I'm not familiar with the exact conditions when a commit should be backported). Thanks for doing the backport (if you decide to do it).

https://github.com/llvm/llvm-project/pull/136720