DB/SAI: New Hearthglen Fixes

Several missing texts for creatures in New Hearthglen

Also scripts Admiral Barean Westwind (Dragonblight version)
Core/Transports: Delayed adding transport model to next tick after teleporting to fix race conditions happening when teleporting transport happens at the same time as destination map balances its dynamic LoS tree
Core/DBLayer: Fixed an incredibly rare memory leak happening when player started loading from database and never finished