Handling the core issue caused by multiple calls to the destroy method of IntermResultManager.

src/sql/dtl/ob_dtl_interm_result_manager.cpp

@@ -160,6 +160,8 @@ void ObDTLIntermResultManager::destroy()
   if (IS_INIT) {
     erase_tenant_interm_result_info();
     map_.destroy();
+    // Used to handle scenarios where destroy is called multiple times.
+    is_inited_ = false;
   }
 }