cherry-pick [Bug] [Seatunnel-Task] Run Mode defaults to run, and you cannot select a null value

#14267

dolphinscheduler-task-plugin/dolphinscheduler-task-seatunnel/src/main/java/org/apache/dolphinscheduler/plugin/task/seatunnel/flink/SeatunnelFlinkParameters.java

@@ -35,6 +35,7 @@ public class SeatunnelFlinkParameters extends SeatunnelParameters {
     @Getter
     public enum RunModeEnum {
 
+        NONE("none"),
         RUN("--run-mode run"),
         RUN_APPLICATION("--run-mode run-application");
 

dolphinscheduler-task-plugin/dolphinscheduler-task-seatunnel/src/main/java/org/apache/dolphinscheduler/plugin/task/seatunnel/flink/SeatunnelFlinkTask.java

@@ -43,7 +43,13 @@ public class SeatunnelFlinkTask extends SeatunnelTask {
     @Override
     public List<String> buildOptions() throws Exception {
         List<String> args = super.buildOptions();
-        args.add(Objects.isNull(seatunnelParameters.getRunMode()) ? SeatunnelFlinkParameters.RunModeEnum.RUN.getCommand() : seatunnelParameters.getRunMode().getCommand());
+        if (!(Objects.isNull(seatunnelParameters.getRunMode())
+                && SeatunnelFlinkParameters.RunModeEnum.NONE.equals(seatunnelParameters.getRunMode()))) {
+            args.add(
+                    Objects.isNull(seatunnelParameters.getRunMode())
+                            ? SeatunnelFlinkParameters.RunModeEnum.RUN.getCommand()
+                            : seatunnelParameters.getRunMode().getCommand());
+        }
         if (StringUtils.isNotBlank(seatunnelParameters.getOthers())) {
             args.add(seatunnelParameters.getOthers());
         }

dolphinscheduler-ui/src/views/projects/task/components/node/fields/use-sea-tunnel.ts

@@ -180,6 +180,10 @@ export const STARTUP_SCRIPT = [
 ]
 
 export const FLINK_RUN_MODE = [
+  {
+    label: 'none',
+    value: 'NONE'
+  },
   {
     label: 'run',
     value: 'RUN'