Add possibility to ignore users (#2329)

* Add ignore users

* Ignore users in pushrules
Add passing tests

* Update sytest lists

* Store ignore knowledge in the sync API

* Fix copyrights

Co-authored-by: Neil Alexander <neilalexander@users.noreply.github.com>

syncapi/streams/stream_invite.go

@@ -54,6 +54,10 @@ func (p *InviteStreamProvider) IncrementalSync(
 	}
 
 	for roomID, inviteEvent := range invites {
+		// skip ignored user events
+		if _, ok := req.IgnoredUsers.List[inviteEvent.Sender()]; ok {
+			continue
+		}
 		ir := types.NewInviteResponse(inviteEvent)
 		req.Response.Rooms.Invite[roomID] = *ir
 	}