Avoid sharing session with RenderedTaskInstanceFields write and delete (

#9993)

Sharing session with RTIF leads to idle-in-transaction timeout error when DAG serialization is enabled and task running duration exceeds the idle-in-transaction timeout setting of the database.

(cherry picked from commit ffcd060)

airflow/models/taskinstance.py

@@ -964,8 +964,8 @@ def signal_handler(signum, frame):
 
                 self.render_templates(context=context)
                 if STORE_SERIALIZED_DAGS:
-                    RTIF.write(RTIF(ti=self, render_templates=False), session=session)
-                    RTIF.delete_old_records(self.task_id, self.dag_id, session=session)
+                    RTIF.write(RTIF(ti=self, render_templates=False))
+                    RTIF.delete_old_records(self.task_id, self.dag_id)
 
                 task_copy.pre_execute(context=context)