[clang] [alpha.webkit.UncountedCallArgsChecker] Don't assume local variables are safe & treat guarded local variable as safe function arguments (PR #82305)

[Artem Dergachev via cfe-commits]

haoNoQ wrote:

I just thought two PRs, accepted 1, then there were 0 left, and I was confused 😅 

https://github.com/llvm/llvm-project/pull/82305