Chore: Use state machine with admin user

[KevinMulhern]

Because:

• A state machine will make it easier to reason about state transitions and make sure the state change rules are enforced
• Closes: https://github.com/TheOdinProject/theodinproject/issues/4658

This commit:

• Adds AASM for the state machine DSL
• Renames admin user active status to "activated" to be more uniform with the other statuses
• Adds a new "pending reactivation" status to hold reactivated users until they set new password and 2fa credentials
• Creates activities automatically when an admin user status changes
• Adds status traits to admin user factory
• Adds current attributes to set the admin user so we can use the current admin user when creating an activity from a model.