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

[Gábor Horváth via cfe-commits]

Xazax-hun wrote:

`inline-functions-with-ambiguous-loops` sounds good to me. I don't think it makes sense to have `legacy` in the name of an on by default setting. 

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