- Also continue renaming things related to the concierge app
- Enhance the uninstall test to also test uninstalling the supervisor
and local-user-authenticator apps
- Variables specific to concierge add it to their name
- All variables now start with `PINNIPED_TEST_` which makes it clear
that they are for tests and also helps them not conflict with the
env vars that are used in the Pinniped CLI code
