[AIRFLOW-6177] Log DAG processors timeout event at error level, not info (#6731)
[AIRFLOW-6177] Log DAG processors timeout event at error level, not info (#6731)

This case prevents a DAG from being scheduled so should be an error.

(cherry picked from commit fb929ebd06f3359b22f683957fead6f949fb9155)

owlabs/incubator-airflow,owlabs/incubator-airflow,owlabs/incubator-airflow,owlabs/incubator-airflow