[Chore](Job)Add the configuration of the maximum number of persistence tasks for the job (#28411)

fe/fe-common/src/main/java/org/apache/doris/common/Config.java

@@ -1585,7 +1585,10 @@ public class Config extends ConfigBase {
      */
     @ConfField(description = {"任务堆积时用于存放定时任务的队列大小", "The number of timer jobs that can be queued."})
     public static int job_dispatch_timer_job_queue_size = 1024;
-
+    @ConfField(description = {"一个 Job 的 task 最大的持久化数量，超过这个限制将会丢弃旧的 task 记录, 如果值 < 1, 将不会持久化。",
+            "Maximum number of persistence allowed per task in a job,exceeding which old tasks will be discarded，"
+                   + "If the value is less than 1, it will not be persisted." })
+    public static int max_persistence_task_count = 100;
     @ConfField(description = {"finished 状态的 job 最长保存时间，超过这个时间将会被删除, 单位：小时",
             "The longest time to save the job in finished status, it will be deleted after this time. Unit: hour"})
     public static int finished_job_cleanup_threshold_time_hour = 24;