Bounce handler should manage team subscriptions too
Currently, when the bounce handler triggers for a given email, it will unsubscribe said email from all packages and send a notification email but it will do nothing for team subscriptions of said email.
The net result is that it will keep receiving messages via the team subscriptions which will trigger more bounces and more unsubscription notifications except that the bounce handler will do nothing and the notification will look weird like this:
The email firstname.lastname@example.org bounces too much, it has been unsubscribed from the Debian Package Tracker. Here's the list of subscriptions which have been removed: -- Debian Package Tracker
Unsubscribing emails from teams is probably a bit too drastic... we might want to "mute" all the team subscriptions associated to the problematic email instead.