[clang-tools-extra] [clang-tidy] fix crash due to assumed callee in min-max-use-initializer-list (PR #91992)

[Julian Schmidt via cfe-commits]

5chmidti wrote:

I have a few small changes to `findArgs` that I have not committed, which would change the `if`'s to check the exact number of args that are expected, instead of `< 3` and `else` (+change from iterators to `getArg(n)`). Should I add them as well?

https://github.com/llvm/llvm-project/pull/91992