Scripts/CoS: Added SetDespawnAtFar, fixes Arthas despawning if no players are in range

(specially during waves)
DB/Creature: Fix class of Water Terror
Merge branch '3.3.5' of https://github.com/TrinityCore/TrinityCore into ghbb
Revert "更新"

This reverts commit 9f0fe8556259d82aad22457d1abe68aa0c483835.