[Gameplay] Cho'Gath - legendary skins ult sfx issues redux

On Cho'Gath, while using either of his legendary skins (Gentleman or Battlecast), the sfx used for the ult are having the same issues they had in the 6.7 bug, causing the classic skin ult sfx to play under each skin's custom VO lines for the ult.

1. Play Cho'Gath with either legendary skin
2. Use Feast
3. Listen: you will hear classic Cho'Gath's ravenous scarfing/gulping/gobbling sfx instead of the custom ones