Core/Spells: Allow persistent area auras to apply all of their effects upon creation. (#30422)

This fixes the issue where the area auras do not instantly apply their effects.
Actually, they were only applying the last SPELL_EFFECT_PERSISTENT_AREA_AURA;
Flare and Frost Trap have 2 and 3 SPELL_EFFECT_PERSISTENT_AREA_AURA effects respectively, so only the last one would be applied.

Co-Authored-By: zana244 <[email protected]>

Author: CraftedRO

src/server/game/Spells/SpellEffects.cpp

@@ -1600,7 +1600,9 @@ void Spell::EffectPersistentAA()
         return;
 
     ASSERT(_dynObjAura->GetDynobjOwner());
-    _dynObjAura->_ApplyEffectForTargets(effectInfo->EffectIndex);
+    for (size_t i = 0; i < m_spellInfo->GetEffects().size(); ++i)
+        if (m_spellInfo->GetEffect(SpellEffIndex(i)).IsEffect(SPELL_EFFECT_PERSISTENT_AREA_AURA))
+            _dynObjAura->_ApplyEffectForTargets(i);
 }
 
 void Spell::EffectEnergize()