Core/Auras: restrict target map update only to area auras as player requires to have auras registered on load

Closes #21472

(cherry picked from commit 7cff1b540c)

src/server/game/Spells/Auras/SpellAuraEffects.cpp

@@ -1576,7 +1576,6 @@ void AuraEffect::HandleAuraGhost(AuraApplication const* aurApp, uint8 mode, bool
         return;
 
     Player* target = aurApp->GetTarget()->ToPlayer();
-
     if (!target)
         return;
 

src/server/game/Spells/Auras/SpellAuras.cpp

@@ -2283,6 +2283,10 @@ void UnitAura::FillTargetMap(std::unordered_map<Unit*, uint32>& targets, Unit* c
         }
         else
         {
+            // skip area update if owner is not in world!
+            if (!GetUnitOwner()->IsInWorld())
+                continue;
+
             float radius = effect->CalcRadius(caster);
 
             if (!GetUnitOwner()->HasUnitState(UNIT_STATE_ISOLATED))