Convert Svala Sorrowgrave to event system
Merge pull request #11275 from Carbenium/UtgardePinnacle

Scripts/UtgardePinnacle: Convert Svala Sorrowgrave to event system
Scripts: replace some SetOrientation() calls with spline packets and some random changes
Merge branch 'master' of https://github.com/TrinityCore/TrinityCore into ghbb