Add `Add await` fix for `for_in_of_invalid_type` when `Future<Iterable>`/`Stream`

Consider:

```dart
Future<void> foo(Future<List<int>> future) async {
  final controller = StreamController<int>();
  for (final i in controller.stream) {}
  for (final l in future) {}
}
```

For both cases, we could have the `Add await` fix. The first case only needs to insert it before `for`.

