MediaWiki allows triggering Email notifications when someone edits user's talk page.
Migrate this system into the newly created Notifications component, making sure there is no behaviour/logic change.
In contrast to T387988, this Notification is triggered on wikis, therefore it's behaviour should be validated after deployment.
Acceptance Criteria:
- There is no behaviour change to existing Talk page email Notifications
- RecentNotitifcationChangeHandler handles te Talk page notifications
- RecentNotificationChangeHandler uses service from T387987 to trigger Emails