Feature request: Airflow Kerberos ticket renewer

[Jimvin]

Apache Airflow has support for Kerberos authentication and managing tickets using a ticket renewal service that ensures kerberos TGT is renewed before it expires.

Documentation: https://airflow.apache.org/docs/apache-airflow/stable/security/kerberos.html

• Add krb5-workstation to the Airflow Docker image (required for ticket renewer)
• Add support for running the ticket renewer if Kerberos is enabled