dynamically create ingress for running sparkapplication to access spark-ui outside of the k8s cluster

when submitting a sparkapplication resource the driver will expose port 4040 where we can access the spark-ui. unfortunately the ui is available only within the cluster, not outside of it by using a webbrowser on a users pc.

of course it's possible to create an ingress by myself for every spark application I'm submitting but since sparkapplications are ephemeral after a couple of weeks there will be lots of dead ingresses in the cluster because the spark application they belong to has terminated already.

i think the operator should create an ingress / route whenever a sparkapplication is submitted. possible configuration option would be a value set in the operator itself. i'd prefer that rather than setting the ingress configs with every application

@sbernauer feel free to add

Start by locating the operator's SparkApplication submission and reconciliation entry points. Determine how a configurable ingress or route would be created for port 4040 and removed when the SparkApplication terminates. Done means the UI is reachable outside the cluster without leaving dead ingress resources.