Core/Misc: Include cleanup - remove MapUtils.h from Containers.h

(cherry picked from commit d778d5ec7c)

# Conflicts:
#	src/server/game/Achievements/CriteriaHandler.cpp
#	src/server/game/Globals/ObjectMgr.cpp
#	src/server/scripts/BrokenIsles/zone_mardum.cpp
#	src/server/scripts/ExilesReach/zone_exiles_reach.cpp
#	src/server/scripts/Shadowlands/SepulcherOfTheFirstOnes/boss_anduin_wrynn.cpp

src/server/scripts/Events/fireworks_show.cpp

@@ -22,6 +22,7 @@
 #include "GameObject.h"
 #include "GameObjectAI.h"
 #include "GameTime.h"
+#include "MapUtils.h"
 #include "Util.h"
 
 enum FireworksShowTypeObjects

src/server/scripts/Spells/spell_generic.cpp

@@ -34,6 +34,7 @@
 #include "GridNotifiersImpl.h"
 #include "Item.h"
 #include "Log.h"
+#include "MapUtils.h"
 #include "MotionMaster.h"
 #include "NPCPackets.h"
 #include "ObjectMgr.h"