Increase scheduler loop sleep in dag.test for executors (#58739)

If we are using a real executor, those often make some requests or describe
calls to an external service to track the progress of the running tasks.
Doing that every 1s is way too aggressive, especially given that these are
just tests.

Author: o-nikolas

task-sdk/src/airflow/sdk/definitions/dag.py

@@ -1316,7 +1316,13 @@ def test(
                 ids_unrunnable = {x for x in all_tis if x.state not in FINISHED_STATES} - scheduled_tis
                 if not scheduled_tis and ids_unrunnable:
                     log.warning("No tasks to run. unrunnable tasks: %s", ids_unrunnable)
-                    time.sleep(1)
+                    if use_executor:
+                        # If we are using a real executor, those often make some request or describe call to
+                        # an external service to track the progress of the running tasks. Doing that every 1s
+                        # is way too aggressive, especially given that these are just tests.
+                        time.sleep(30)
+                    else:
+                        time.sleep(1)
 
                 for ti in scheduled_tis:
                     task = self.task_dict[ti.task_id]