Store the spawn ticket id inside entity instead of maintaining a map of entity to ticket

Signed-off-by: srikappa-amzn <srikappa@amazon.com>

Code/Framework/AzCore/AzCore/Component/Entity.cpp

@@ -655,6 +655,16 @@ namespace AZ
         m_stateEvent.Signal(oldState, m_state);
     }
 
+    void Entity::SetSpawnTicketId(u32 spawnTicketId)
+    {
+        m_spawnTicketId = AZStd::move(spawnTicketId);
+    }
+
+    u32 Entity::GetSpawnTicketId() const
+    {
+        return m_spawnTicketId;
+    }
+
     void Entity::OnNameChanged() const
     {
         EBUS_EVENT_ID(GetId(), EntityBus, OnEntityNameChanged, m_name);

Code/Framework/AzCore/AzCore/Component/Entity.h

@@ -133,6 +133,9 @@ namespace AZ
         //! @return The state of the entity. For example, the entity has been initialized, the entity is active, and so on.
         State GetState() const { return m_state; }
 
+        u32 GetSpawnTicketId() const;
+        void SetSpawnTicketId(u32);
+
         //! Connects an entity state event handler to the entity.
         //! All state changes will be signaled through this event.
         //! @param handler reference to the EntityStateEvent handler to attach to the entities state event.
@@ -411,6 +414,8 @@ namespace AZ
         //! A user-friendly name for the entity. This makes error messages easier to read.
         AZStd::string m_name;
 
+        u32 m_spawnTicketId = 0;
+
         //! The state of the entity.
         State m_state;