Update 458; Hotfix and reinstating Sinister Dragon

This update is reinstating the "Sinister Dragon" update, along with a few other hotfixes.
See Sinister Dragon: https://store.steampowered.com/newshub/app/753650/view/2900836612649227300

Changes

Fix for cleanup of items failing due to errors during cleanup
Fix for players reloading the same scene multiple times, causing the wrong level to load
Fix for rare edge case where players were not being able to ingest full state snapshots on connection when other players were joining at the same time
Rollback of networking change that was lowering performance on some machines while improving performance for the most laggy players; the negative impact this was having on some machines is not what we expected and we will re-evaluate this change