AH related fixes

Load items from memory instead of DB (may break 3rd party programs)
Fix item suffix search Closes #9196
For AHBot set expired auctions ignored from update process
AHBot related fixes

Fix rebuild command requiring a dummy value

Fix ahbot config to normal

Fix sellprice setting in core. Closes #13425
Scripts: replaced various Location struct defines with proper Position or G3D::Vector3
Merge pull request #13455 Rochet2/ah

AH related fixes
Core/AH: Code cleanup

Remove unused paramters from RemoveAuction(), kept till now for compatibility with ahbot patch.
Reverts 28dffbee11024c1abc82a29a3fef655d9262904b
DB/SAI: Added SAI for the second part of mobs before the gunship battle
Scripts/Freya: Fix Lumberjacked Achieve

Closes #13435
Fixes #8166
Scripts/Ulduar: Fix Kologarn's arms being despawned before they're used to access the rubble spawning triggers
DB/Item: Northrend Mystery Gem Pouch (3.3.5)

* This is probably only valid for 3.3.5 as item is marked as no longer available in game and last comment on wowhead is from 4.1.0 saying item is now worthless, was added in 3.2
* Remove northrend rare gems for emblem of heroism from Lhara and replace with this item
DB/Misc: Zone Wide Texts
DB/Misc: Short John Mithril / Arena Treasure Chest

* Remove permament spawn of Arena Treasure Chest 
* Script Short John Mithril to start wp at start of event, say his 2 lines (1st zone wide) and summon Arena Treasure Chest
Merge pull request #13440 from Rochet2/ahbot

Core/AH: AHBot related fixes
Merge branch '3.3.5' of https://github.com/TrinityCore/TrinityCore into 3.3.5