DB/Misc: Typo fix for Defiling Uther's Tomb

by dr-j, closes #11180
Core/CreatureGroups: Add fields to creature_formations and code to prevent creature crossover in formations.
Wiki update and db values too follow.
DB/Creature_formations: Update a few formations to not crossover at pathing endpoints.
Merge branch 'master' of https://github.com/TrinityCore/TrinityCore into ghbb