Test support for detection and selection of conda environments lacking a python interpreter

[karrtikr]

Refs: #18357

• anyOS: @karthiknadig
• anyOS: @rchiodo

Complexity: 4

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Requirements

• Make sure Conda is installed. Tagging everyone on the team as we already have a bunch of environments available, and it may take a significant time for other folks to install stuff.
• Use pre release build of the python extension.

Step 1: Test discovery

1. Activate Python extension
2. Create two conda environments like so:

conda create -n test1
conda create -n test2

3. Refresh the interpreter's list using the refresh icon to see the environment:
   

Step 2: Test selection

1. Select the environment via the interpreters list.
2. Notice status bar displays the following:
   
3. Expand the notification and click on the hyperlink, the output channel should open which describes the commands extension is running:
   
4. Note environment should still be usable while installation is ongoing, play around with it. Try debugging a simple python file for example:

print("Hello world!")

Packages like ipykernel should also be installable at this point.

4. Notice status bar indicates that a interpreter refresh is triggered once installation has finished.
5. Once refresh has finished, notice interpreter list now indicates that Python is installed within the environment:

6. Double check the output channel to make sure there aren't any unexpected errors.