[fix](routine load) fix invalid EOF tasks scheduling delay (#44949)

Related PR: #39975
In the above PR, we introduce delay schedule EOF tasks to avoid too many
small transactions, but it is invalid, the pr fix the issue.

fe/fe-core/src/main/java/org/apache/doris/load/routineload/RoutineLoadTaskScheduler.java

@@ -106,7 +106,7 @@ private void process() throws UserException, InterruptedException {
             if (routineLoadTaskInfo.getIsEof()) {
                 RoutineLoadJob routineLoadJob = routineLoadManager.getJob(routineLoadTaskInfo.getJobId());
                 if (System.currentTimeMillis() - routineLoadTaskInfo.getLastScheduledTime()
-                        < routineLoadJob.getMaxBatchIntervalS()) {
+                        < routineLoadJob.getMaxBatchIntervalS() * 1000) {
                     needScheduleTasksQueue.addLast(routineLoadTaskInfo);
                     return;
                 }