Core/Scripting: A few fixes for Blackrock Spire. Emberseer now setting properly after wipe and Gyth/Rend event is getting closer to complete.
DB/SAI: Remove instance flags for creatures in battlegrounds

Otherwise they would not work and create runtime warnings on initialization
Core/Units: Removed most calls to SendMovementFlagUpdate for creatures
Scripts/Icecrown Citadel: Fixed Blood Queen Lana'thel flight phase

Closes #8759
DB/Conditions: make Frenzyheart fury only affect players

Closes #6408
DB/SAI: add SAI for The Black Knight's Curse

Closes #7402
DB/SAI: add SAI for the quest Fozruk, Feeboz, Znort and Sleeby

Closes #7920
DB/SAI: add SAI for Wretched Skulker/Bruiser/Husk

Closes #10034
DB/Loot: Gnomish Grenades have Very High drop chance

Closes #10086
DB/Player: add Wooly Mammoth & Armored Brown Bear to factionchange

Closes #10098
Core/Scripting: Gyth event still not finished but completable.
DB/Creature: Fix startup error
DB/Misc: Remove some db strings and waypoint scripts. Repalce with creature text and SAI.
DB/Misc: move text from db string to creature_text.
Db/Misc: More db strings to creature text
DB/Misc: More convertions from db string. SAI waypoints not working correctly, core issue. Action 66 turn to not working, core issue.
DB/waypoints: Add some missing waypoints
DB/Misc: Missing spawn and pathing for UBRS
DB/Misc: Typo fix
Core/Scripting: More updates for BRS instance. Added missing scripts for urok and gizrul.