refactor: Moved definition of StartTriggerArgs as deprecated classes in old import location to base instead of init

Author: davidblain-infrabel

airflow-core/src/airflow/triggers/__init__.py

@@ -26,9 +26,6 @@
 
 
 __deprecated_classes = {
-    "base": {
-        "StartTriggerArgs": "airflow.sdk.bases.trigger.StartTriggerArgs",
-    },
     "external_task": {
         "WorkflowTrigger": "airflow.providers.standard.triggers.external_task.WorkflowTrigger",
         "DagStateTrigger": "airflow.providers.standard.triggers.external_task.DagStateTrigger",

airflow-core/src/airflow/triggers/base.py

@@ -30,11 +30,19 @@
     model_serializer,
 )
 
+from airflow.utils import add_deprecated_classes
 from airflow.utils.log.logging_mixin import LoggingMixin
 from airflow.utils.state import TaskInstanceState
 
 log = structlog.get_logger(logger_name=__name__)
 
+__deprecated_classes = {
+    __name__: {
+        "StartTriggerArgs": "airflow.sdk.bases.trigger.StartTriggerArgs",
+    },
+}
+add_deprecated_classes(__deprecated_classes, __name__)
+
 
 class BaseTrigger(abc.ABC, LoggingMixin):
     """