Support specifying Python Interpreter via Path in kernel picker

[DonJayamanne]

https://github.com/microsoft/vscode-jupyter/issues/15086

We have had similar requests in the past.

[DonJayamanne]

Pros

• Can be easier We've seen that users prefer to just enter the Url in Remote Jupyter Server picker Besides this issue is a result of users filing bugs indicating the fact that this feature does not work.

Problems

• Assume user enters a path to an interpreter and that kernel is selected
  • User now reloads VS Code,
  • At this point we need to re-create the same controller, but to do this, we need to keep track of the fact that the user manually entered a path to an interpeter
  • Solution: Perhaps its best we not implement this feature, but allow users to filter existing kernels by entering the paths or the like.