[clang] [clang][analysis] Fix flaky clang/test/Analysis/live-stmts.cpp test (2nd attempt) (PR #127406)

[Balazs Benics via cfe-commits]

steakhal wrote:

> Is there interest in backporting this to the release branch? If so, can someone manually create a PR?

Thanks for the heads up. Here is the manual backport: #139591 @tstellar 

https://github.com/llvm/llvm-project/pull/127406