BUG: Most ITK Python type hints do not show up in VS Code (Windows)

### Description

[https://github.com/InsightSoftwareConsortium/ITK/pull/3444](https://github.com/InsightSoftwareConsortium/ITK/pull/3444) and its predecessors such as [https://github.com/InsightSoftwareConsortium/ITK/pull/3200](https://github.com/InsightSoftwareConsortium/ITK/pull/3200) were intended to introduce/improve type hints with the ITK Python package; however, only a subset of Pythonic type hints appear in VS Code using a pip-installed ITK package.

### Steps to Reproduce

1. `pip install itk`
2. Install VS Code with Python extensions, set Python interpreter
3. Create a new Python file
```py
import itk
itk.
```
4. View list of suggestions after `itk.` in line 2

### Expected behavior

Most/all values in `itk` namespace are viewable in list. For instance, `itk.Image`, `itk.join_series_image_filter`

### Actual behavior

Only functions/types defined in [https://github.com/InsightSoftwareConsortium/ITK/blob/master/Wrapping/Generators/Python/itk/support/extras.py](https://github.com/InsightSoftwareConsortium/ITK/blob/master/Wrapping/Generators/Python/itk/support/extras.py) or [https://github.com/InsightSoftwareConsortium/ITK/blob/master/Wrapping/Generators/Python/itk/support/types.py](https://github.com/InsightSoftwareConsortium/ITK/blob/master/Wrapping/Generators/Python/itk/support/types.py) appear to be represented in autocomplete suggestions

### Reproducibility

### Versions

ITK v5.3rc4, v5.3rc04.post1

### Environment

Windows 10
VS Code 1.62

EDIT: Per @PranjalSahu 's comment below this issue is also observed in VSCode on Linux.

### Additional Information