Core/Spell: Remove all raid auras on party leave (#17663)

Core/Spell: Remove all raid auras on party leave

src/server/game/Entities/Unit/Unit.cpp

@@ -4064,6 +4064,20 @@ void Unit::RemoveAllAurasExceptType(AuraType type1, AuraType type2)
     }
 }
 
+void Unit::RemoveAllGroupBuffsFromCaster(ObjectGuid casterGUID)
+{
+    for (AuraMap::iterator iter = m_ownedAuras.begin(); iter != m_ownedAuras.end();)
+    {
+        Aura* aura = iter->second;
+        if (aura->GetCasterGUID() == casterGUID && aura->GetSpellInfo()->IsGroupBuff())
+        {
+            RemoveOwnedAura(iter);
+            continue;
+        }
+        ++iter;
+    }
+}
+
 void Unit::DelayOwnedAuras(uint32 spellId, ObjectGuid caster, int32 delaytime)
 {
     AuraMapBoundsNonConst range = m_ownedAuras.equal_range(spellId);