Core/SAI: Fix the respawn event for GameObjects (#23112)

Closes #22612

(cherry picked from commit 75a8639242)

src/server/game/AI/SmartScripts/SmartAI.cpp

@@ -998,6 +998,9 @@ void SmartGameObjectAI::UpdateAI(uint32 diff)
 void SmartGameObjectAI::InitializeAI()
 {
     GetScript()->OnInitialize(me);
+    // do not call respawn event if go is not spawned
+    if (me->isSpawned())
+        GetScript()->ProcessEventsFor(SMART_EVENT_RESPAWN);
     //Reset();
 }