Use more specific command to list environments

[patricklabatut]

Description

This small change uses the more specific env list command instead of info to retrieve the list of environments. micromamba doesn't dump environments in the output of the info --json command, so while the change doesn't modify anything when using standard conda, it unblocks using conda-pack together with micromamba.

Checklist - did you ...

• Add a file to the news directory (using the template) for the next release's release notes?
• Add / update necessary tests?
• Add / update outdated documentation?

[conda-bot]

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In order for us to review and merge your code, please e-sign the Contributor License Agreement PDF. We then need to manually verify your signature, merge the PR (conda/infrastructure#823), and ping the bot to refresh the PR.

[xhochy]

Happy to merge this but I need a signed CLA for this.

[patricklabatut]

@xhochy Thanks! Sure, I had actually signed the CLA shortly after seeing this being required. It looks to me the matching PR in the infrastructure repo did acknowledge that (with the cla-signed label) but is still lacking a review stamp...

[xhochy]

@patricklabatut Can you look into the failures here? They are related to your change.

[github-actions]

Hi there, thank you for your contribution!

This pull request has been automatically marked as stale because it has not had recent activity. It will be closed automatically if no further activity occurs.

If you would like this pull request to remain open please:

1. Rebase and verify the changes still work
2. Leave a comment with the current status

NOTE: If this pull request was closed prematurely, please leave a comment.

Thanks!