[Improve][Zeta] Support close idle task for multiple sinks

Author: hailin0

seatunnel-e2e/seatunnel-connector-v2-e2e/connector-cdc-mysql-e2e/src/test/resources/mysqlcdc_to_mysql_with_multi_table_mode_one_table.conf

@@ -43,6 +43,9 @@ transform {
 }
 
 sink {
+  console {
+    source_table_name = "customers_mysql_cdc"
+  }
   jdbc {
     source_table_name = "customers_mysql_cdc"
     url = "jdbc:mysql://mysql_cdc_e2e:3306/mysql_cdc2"

seatunnel-e2e/seatunnel-connector-v2-e2e/connector-cdc-mysql-e2e/src/test/resources/mysqlcdc_to_mysql_with_multi_table_mode_two_table.conf

@@ -43,6 +43,9 @@ transform {
 }
 
 sink {
+  console {
+    source_table_name = "customers_mysql_cdc"
+  }
   jdbc {
     source_table_name = "customers_mysql_cdc"
     url = "jdbc:mysql://mysql_cdc_e2e:3306/mysql_cdc2"

seatunnel-engine/seatunnel-engine-server/src/main/java/org/apache/seatunnel/engine/server/checkpoint/CheckpointCoordinator.java

@@ -441,10 +441,6 @@ protected void readyToCloseIdleTask(TaskLocation taskLocation) {
                             subTask.getJobId());
                 }
             }
-            if (subTaskList.size() != 2) {
-                throw new UnsupportedOperationException(
-                        "Unsupported close not reader/writer task group: " + subTaskList);
-            }
             readyToCloseIdleTask.addAll(subTaskList);
             tryTriggerPendingCheckpoint(CheckpointType.CHECKPOINT_TYPE);
         }