Python type hints: fix arbitrary argument hints

Fix annotation import in from_callable to support annotations on arbitrary (variadic) arguments.

For example, in IOTypeHintsTest.test_from_callable, the annotation for args and kwargs should be:
```

*args: T
**kwargs: str

```

and converted to this in from_callable:
```

Tuple[T, ...]
Dict[str, str]

```

Imported from Jira [BEAM-10013](https://issues.apache.org/jira/browse/BEAM-10013). Original Jira may contain additional context.
Reported by: udim.