DB/SAI: Add script for Quergo's Gold

Closes #1677
DB/Loot:

+ Remove Zulian Mudskunk from Zulian Crocolisk loot template  Closes #9169
+ Add Vicious Oil to Vicous Oil Closes #9147
DB/Quests:

 Update Quest Requirements for To Bor'gorok Outpost, Quickly! Closes #9113
 Fix Quest Grouping
 Add Quest Conditions for Hellscream's Champion  Closes #9092
 Fix SAI for Hugh Glass Closes #9097
Core/Auras: Only auras that are stackable to use the same slot
Core/Vehicles: Fix another crash

Fixes #9225
Scripts/Blackwing Lair: Broodlord Lashlayer clean-up.
Scripts/BWL: Fix typo in recent commit.
Merge pull request #9228 from gigatotem/BWLv2

Scripts/Blackwing Lair: Broodlord Lashlayer clean-up.
Say NO to whitespace
Scripts/BWL: Fix build
Scripts/BWL: Fix build no. 2
Core/Character: Rename engrish function
Core/Auras: Prevent saving vehicle auras to db for players as they require both caster and target to be in world (which cannot be guaranteed)
Merge branch 'master' of github.com:TrinityCore/TrinityCore
Core/SAI: Add actions to set/add/remove (104/105/106) gameobject flags
Scripts/Icecrown Citadel: Improvements to Shadowmourne quest line
Core/Auras: Always run all script hooks attached to the aura to prevent leaving aura script state stack in unbalanced state
Remove BOM from 2 SQL files

Closes #9233
Core/Vehicles: Fix another crash

Don't set Unit::m_vehicle until VehicleJoinEvent::Execute
Merge https://github.com/TrinityCore/TrinityCore into mmaps