`avoid_function_literals_in_foreach_calls` missing case - unqualified

[FMorschel]

Repro:

void foo(List<int> list) {
  list.forEach((element) { // avoid_function_literals_in_foreach_calls
    if (element.isEven) print(element);
  });
}

extension on List<int> {
  void printEvenNumbers() {
    forEach((element) { // nothing
      if (element.isEven) print(element);
    });
  }
}