Core/BattlegroundIC:

* Fixed Catapults
* Fixed Graveyards
* Fixed Cannons on Gunships
* More Blizzlike Teleport to Gunship
* Fixed Gunship Teleport to Hangar
* Fixed Teleporters

Closes #13052
Fixes #12323 and #9557
Merge branch 'master' of https://github.com/TrinityCore/TrinityCore into master_revamp