[fix](mtmv)fix mtmv may have repeat tasks after canceled

fe/fe-core/src/main/java/org/apache/doris/job/extensions/mtmv/MTMVTask.java

@@ -331,6 +331,9 @@ private String getDummyStmt(Set<String> refreshPartitionNames) {
     public synchronized void onFail() throws JobException {
         LOG.info("mtmv task onFail, taskId: {}", super.getTaskId());
         super.onFail();
+        if (super.getStatus() != TaskStatus.FAILED) {
+            return;
+        }
         after();
     }
 
@@ -340,12 +343,18 @@ public synchronized void onSuccess() throws JobException {
             LOG.debug("mtmv task onSuccess, taskId: {}", super.getTaskId());
         }
         super.onSuccess();
+        if (super.getStatus() != TaskStatus.SUCCESS) {
+            return;
+        }
         after();
     }
 
     @Override
     protected synchronized void executeCancelLogic(boolean needWaitCancelComplete) {
         LOG.info("mtmv task cancel, taskId: {}", super.getTaskId());
+        if (super.getStatus() != TaskStatus.CANCELED) {
+            return;
+        }
         if (executor != null) {
             executor.cancel(new Status(TStatusCode.CANCELLED, "mtmv task cancelled"), needWaitCancelComplete);
         }

regression-test/suites/mtmv_p0/test_task_mtmv.groovy

@@ -57,6 +57,9 @@ suite("test_task_mtmv") {
            log.info("cancel error msg: " + e.getMessage())
            assertTrue(e.getMessage().contains("no running task"));
         }
+    def tasksAfterCancel = sql """ select TaskId from tasks('type'='mv') where MvName = '${mvName}';"""
+   // should only has one task after cancel
+    assertEquals(1, tasksAfterCancel.size());
     sql """drop materialized view if exists ${mvName};"""
 
 }