Core/Scripting: UBRS Boss Pyroguard Emberseer now scripted.

-TrinityCore
Core/Scripting: Update to BRS
Core/Scripting: Start Scripting Gyth / Rend event for UBRS. Add creat…

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-TrinityCore
Core/Scripting: Updated BWL Scripts. Thanks to gerripeach for the base.

-TrinityCore
Core: Fix non pch build