refactor: Replace task chaining with chain function for improved readability in DAG

Author: chengpinglin

dags/tpu_observability/tpu_info_format_validation_dags.py

@@ -724,16 +724,14 @@ def generate_second_node_pool_name(
           setups=create_node_pool,
       )
 
-      # Airflow uses >> for task chaining, which is pointless for pylint.
-      # pylint: disable=pointless-statement
-      (
-          cluster_info
-          >> create_node_pool
-          >> apply_time
-          >> pod_names
-          >> wait_for_job_start
-          >> verification_group
-          >> cleanup_workload
-          >> cleanup_node_pool
+      chain(
+          cluster_info,
+          create_node_pool,
+          apply_time,
+          pod_names,
+          wait_for_job_start,
+          verification_group,
+          cleanup_workload,
+          cleanup_node_pool,
       )
       # pylint: enable=pointless-statement