DB/Quest: Flight of the Wintergarde Defender

1) Add missing Helpless Wintergarde Villagers and associated updates for these
2) Script quest, based on original work by @Rushor
3) Fixed credit for rescueing villagers as this did not work in original script and added wintergarde mine to areas where gryphon is allowed to be flown as the tooltip for the mount states thats its allowed there

Closes https://github.com/TrinityCore/TrinityCore/issues/4175
Script/Spells: fixed crash in spell_hun_aspect_of_the_beast

Closes #13560
Merge branch '3.3.5' of https://github.com/TrinityCore/TrinityCore into master_revamp