fix(python): module import fails: NameError: name 'List' is not defin…

…ed (#2851)

When importing a module in Python, you can get this error:
```
NameError: name 'List' is not defined
```

JSII generated code:
```python
import abc
import builtins
import datetime
import enum
import typing

import jsii
import publication
import typing_extensions

from ._jsii import *

__all__: List[typing.Any] = []  # <--- HERE IS THE BUG

publication.publish()
```

Just need to prefix `List` with `typing.`

Related issue/pr:

- #2750
- #2757

---

By submitting this pull request, I confirm that my contribution is made under the terms of the [Apache 2.0 license].

[Apache 2.0 license]: https://www.apache.org/licenses/LICENSE-2.0

packages/jsii-pacmak/lib/targets/python.ts

@@ -1607,7 +1607,7 @@ class PythonModule implements PythonType {
       }
       code.unindent(']');
     } else {
-      code.line('__all__: List[typing.Any] = []');
+      code.line('__all__: typing.List[typing.Any] = []');
     }
 
     // Finally, we'll use publication to ensure that all of the non-public names