064237a9a4
When we change the `required_state` config for a room in sliding sync, we insert a new entry into the `sliding_sync_connection_required_state` table. As the sliding sync connection advances we can accrue a lot of stale entries, so let's clear those out. This is a sort of follow on from #19211 --------- Co-authored-by: Eric Eastwood <erice@element.io>