DB/Creature: Fix class of Water Terror
DB/Creature: Misc updates for AT Valiants and Champions.
DB/Conditions: Gossip conditions for AT Valiants and Champions.
DB/Conditions: Update instance data enum value on condition for Descent into Madness teleporter gossip (previous value was 14 which now refers to BOSS_BRIGHTLEAF)
DB/Achievement: Now We're Cookin

By @Vincent-Michael closes #3993
DB/Creature: Fix Void Conduit InhabitType
DB/Quest: We Strike!

Script http://www.wowhead.com/quest=11592/we-strike

Closes https://github.com/TrinityCore/TrinityCore/issues/4445
Closes https://github.com/TrinityCore/TrinityCore/issues/10762
DB/Achievement: Pilgrim's Peril

Believe original author of this fix may be @VincentMichael its tested anyway and fixes https://github.com/TrinityCore/TrinityCore/issues/11258

Fixes it so you dont get the full achievement by sitting in any char regardless of whether wearing pilgrims robe, dress or attire or not and without having to sit in any other city.
DB/Creature: Harbinger of the Raven

Script http://www.wowhead.com/npc=21767
Merge branch '3.3.5' of https://github.com/TrinityCore/TrinityCore into master_revamp