[clang] [clang][analysis] Fix flaky clang/test/Analysis/live-stmts.cpp test (PR #126913)

[Balazs Benics via cfe-commits]

steakhal wrote:

> oh sorry, I meant [be25d61](https://github.com/llvm/llvm-project/commit/be25d618320d136faffd9dc450b406557e07634e) :)

Let me know if this test still causes any issues on main. Otherwise, I'll consider this thread concluded.

https://github.com/llvm/llvm-project/pull/126913