fix(settings): ensure we handle file_created, file_deleted and file_restored as file_changed

[skjnldsv]

The provider is file_changed, but we still have some related events. But they are still covered under one setting provider: https://github.com/nextcloud/server/blob/af6de04e9e141466dc229e444ff3f146f4a34765/apps/files/lib/Activity/Settings/FileChanged.php

Fix nextcloud/server#49133
Fix #1889

[skjnldsv]

EDIT: after thoughts, could be a clean way to add child events to the ActivitySettings. So we know we can group them without having to hardcode them into activity.
As a fix this is fine, you can see the use case was hardcoded 4 years ago already.
But for 32, it could be a nice way. Not sure if other providers would benefit from it

[skjnldsv]

/backport to stable30

[skjnldsv]

/backport to stable29

[skjnldsv]

/backport to stable31

[skjnldsv]

Seems like other PRs on master are failing with that cypress test, merging as unrelated