revert: optimize method calls in scheduled_trigger.py

Author: liuruibin

apps/trigger/handler/impl/trigger/scheduled_trigger.py

@@ -243,11 +243,11 @@ def execute(trigger, **kwargs):
         if source_type == "APPLICATION":
             from trigger.handler.impl.task.application_task import ApplicationTask
 
-            ApplicationTask().execute(trigger_task, **kwargs)
+            ApplicationTask.execute(trigger_task, **kwargs)
         elif source_type == "TOOL":
             from trigger.handler.impl.task.tool_task import ToolTask
 
-            ToolTask().execute(trigger_task, **kwargs)
+            ToolTask.execute(trigger_task, **kwargs)
         else:
             maxkb_logger.warning(f"unsupported source_type={source_type}, task_id={trigger_task['id']}")