Refactor example DAGs to have taskgroups as list

Author: pankajkoti

dev/dags/airflow2/example_dag_factory_multiple_config.yml

@@ -66,7 +66,7 @@ example_dag3:
 example_dag4:
   description: "this dag uses task groups"
   task_groups:
-    task_group_1:
+    - group_name: "task_group_1"
       tooltip: "this is a task group"
       dependencies: [task_1]
   tasks:

dev/dags/airflow2/example_task_group.yml

@@ -8,10 +8,10 @@ default:
 example_task_group:
   description: "this dag uses task groups"
   task_groups:
-    task_group_1:
+    - group_name: "task_group_1"
       tooltip: "this is a task group"
       dependencies: [task_1]
-    task_group_2:
+    - group_name: "task_group_2"
       tooltip: "this is a task group"
       parent_group_name: task_group_1
   tasks:

dev/dags/airflow2/example_task_group_as_list.yml

@@ -66,7 +66,7 @@ example_multiple3:
 example_multiple4:
   description: "this dag uses task groups"
   task_groups:
-    task_group_1:
+    - group_name: "task_group_1"
       tooltip: "this is a task group"
       dependencies: [task_1]
   tasks:

dev/dags/airflow3/example_dag_factory_multiple_config.yml

@@ -7,10 +7,10 @@ default:
 task_group:
   description: "this dag uses task groups"
   task_groups:
-    task_group_1:
+    - group_name: "task_group_1"
       tooltip: "this is a task group"
       dependencies: [task_1]
-    task_group_2:
+    - group_name: "task_group_2"
       tooltip: "this is a task group"
       parent_group_name: task_group_1
   tasks:

dev/dags/airflow3/example_task_group.yml

@@ -23,7 +23,7 @@ callbacks:
     param1: param1
     param2: param2
   task_groups:
-    task_group_1:
+    - group_name: "task_group_1"
       default_args:
         on_success_callback: print_hello.print_hello_from_callback
       dependencies: [task_1, task_2]