False negative Wmissing-noreturn warning when a function always throws

[TiborGY]

Unlike GCC, Clang's implementation of -Wmissing-noreturn does not fire when seeing a function that always throws:

void throwError(const std::string& msg){
	throw std::runtime_error(msg);
}

GCC 15.1 issues the following warning:
warning: function might be candidate for attribute 'noreturn' [-Wsuggest-attribute=noreturn]

https://godbolt.org/z/nWPjxb377

[snarang181]

Created #146234.