[AIRFLOW-4450] Fix request arguments in has_dag_access (#5220)
[AIRFLOW-4450] Fix request arguments in has_dag_access (#5220)

has_dag_access needs to use request arguments from both
request.args and request.form.

This is related to the changes made in AIRFLOW-4240/#5039.

(cherry picked from commit 52b121797b328383cd39905ef762fc79e2e6a653)

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