Use an int globalVar2 in the pack regression

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: jketema

cpp/ql/test/query-tests/Best Practices/Unused Entities/UnusedStaticVariables/test.cpp

@@ -55,4 +55,4 @@ static auto sum(auto... values) // $ SPURIOUS: Alert
 	return (0 + ... + values);
 }
 
-unsigned result = sum() + sum(2);
+int globalVar2 = sum() + sum(2);