Add support for search paths for venvs

[Ninecr]

Description:

Hello,

I am using the vscode-python-environments extension, which is currently only available as a pre-release version. It requires the Python extension in VSCode to also be on its pre-release version. After switching to the pre-release version, the Venv Folders or Venv Path settings no longer function, and the extension fails to detect virtual environments in the specified directories.

Steps to Reproduce:

1. Install the pre-release version of the vscode-python-environments extension.
2. Switch the main Python extension to its pre-release version.
3. Set up Venv Folders or Venv Path in the settings.
4. Open a relevant project/workspace.

Expected Behavior:

The Python extension should detect virtual environments located in the specified directories.

Actual Behavior:

Virtual environments are not detected or listed.

[karthiknadig]

Those settings are not supported in this extension. I will mark this as a feature request to add search paths for venvs.

[eleanorjboyd]

these are now supported in the newest version of the pre-release! Let me know if they don't work for you

[eleanorjboyd]

Verification Steps:

1. get the pre-release for python envs ext and python ext
2. add this setting if you don't see the python icon in the sidebar "python.useEnvironmentsExtension: true`
3. Set up Venv Folders or Venv Path in the settings and verify search is done on these paths

Step 3 is generalized if you know how to do that with your own scenario go ahead but expanded a bit for others:

1. create a folder within the root of your workspace
2. create a venv within this folder
3. go to the python panel, confirm that this env does not get discovered (is not shown in the list)
4. edit setting python.venvFolders to include the path to the folder you made
5. reload and confirm the folder is now found
6. repeat steps 4 and 5 but instead with setting python.venvPaths