test_k8s: introduce a DAG submitting a simple Spark job to YARN in cluster mode
This will allow us to check that the YARN integration works as expected for jobs running a spark-submit
job in cluster deploy_mode (both the driver and the application run in YARN itself).
Signed-off-by: Balthazar Rouberol brouberol@wikimedia.org Bug: T377928 Depends-On: https://gerrit.wikimedia.org/r/c/operations/deployment-charts/+/1087903