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

[Ryosuke Niwa via cfe-commits]

rniwa wrote:

haha, sorry for the confusion. I don't have any outstanding PR at this point. Thanks for all the reviews :)

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