`types-python-dateutil` Add return type for `rrule.__iter__`?

```python
from datetime import date

from dateutil.rrule import MONTHLY, rrule

datetimes = [dt for dt in rrule(MONTHLY, dtstart=date(2001, 1, 1), until=date(2005, 1, 1))]

reveal_type(datetimes)  # Revealed type is "builtins.list[Any]"
```


https://github.com/python/typeshed/issues/8625#tasklist-block-882f1d08-3570-4c11-af49-38329f2aad04
