fix(permissionmap): fixes our permission map to actually run the redi…

[ale8k]

…al logic

Originally, when dialing controller we specified superuser for controllers, and admin for models. This was wrong and needed updating.

Now, we dial controllers with the minimum access to receive the "permission check required" error. Upon receiving this error, the redial logic within Call() will run and update the map. If we decide a call is to be "superuser", we do allow this override.

I've removed where we specify permissions as when redialling, even if we did have permissions and they were wrong (for example read for a DumpModelsDB), juju responds with "permission check required" and due to our redial logic we update the map on the redial. As such, its very likely we don't need to put permissions in ourselves and let the redial logic run. I am really unkeen on how we're having to redial and am going to fix this in a follow up.

Engineering checklist

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• Documentation updated
• Covered by unit tests
• Covered by integration tests

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