Avoid spawning conda to get the value for the env variable `CONDA_SHLVL`

[DonJayamanne]

The value for this is defined in etc/profile.d/conda.sh (csh) file of the conda installtion folder.

This env variable is used in the env variables for terminals.

[eleanorjboyd]

@DonJayamanne is this still valid with the envs ext and PET work?

[DonJayamanne]

PET doesn't return CONDA_SHLVL, perhaps something that @anthonykim1 @karthiknadig might be able to answer.
I.e. whether we're still spawning conda to get this info

[github-actions]

Because we have not heard back with the information we requested, we are closing this issue for now. If you are able to provide the info later on, then we will be happy to re-open this issue to pick up where we left off.

Happy Coding!

[eleanorjboyd]

@anthonykim1 wanted to loop back on this

[anthonykim1]

I think we're just accessing it via process.env from past PR: microsoft/vscode-python-environments#693