Capture driver error message from pod termination log

[khorshuheng]

We have been using a fork of the k8s-operator which include the following changes: https://github.com/gojek/spark-on-k8s-operator/pull/1/files

This helps us to debug the cause of failure of the spark application without going through the logs. Can this feature be made available to the official repository as well? Or is this use case too niche / will result in other complications?