The ECM Operator feature is needed, I would like to refer to the implementation of EC Operator and add Operator capabilities to ECM, so that linkis-computation-client can send operator requests to LinkisManager and let LinkisManager forward the request to ECM to execute this operator. The link is: linkis- computation-client -> linkis-application-manager-linkis-engineconn-manager. ------ ECM Operator模块是必须的，我想参考EC Operator的实现方式，为ECM也加上Operator的能力，这样linkis-computation-client就可以发送operator请求给LinkisManager，让LinkisManager将请求转发给ECM去执行这个operator，链路为：linkis-computation-client -> linkis-application-manager-linkis-engineconn-manager。
