Feature description

Add a feature that allows you to archive Ion users

Rationale for adding feature

We already archive users on IPA
Prevents some model relationships from cascading (deleting), which can be useful
@alanzhu0

Suggested implementation(s) (if applicable)

• Set is_active = False and prevent archived users from showing up in search
• Add a Django admin action that allows you to do this and a management command that takes a csv of users as an input. Base this off of existing Ion management commands: example (put this management command in the users app)