PY-63692 Support third-party sdk on python local interpreter panel

[koxudaxi]

This PR supports third-party SDK on the Python Local interpreter panel.

Background

I'm working on creating a plugin for Rye that is a Python package manager. I added classes for extension points. But, PyCharm doesn't show additional Python SDK in the Local interpreter panel.

Test

The change can show the additional SDK like the rye plugin in the config.

[koxudaxi]

I have created the issue in the jetbrains' youtrack https://youtrack.jetbrains.com/issue/PY-63692/Python-local-interpreter-panel-dont-show-third-party-Python-SDK