configOverrides only works at role level

[Jimvin]

Attempting to set configOverrides at the service level doesn't work. Overrides can be set for the individual roles. In the example below I set a spark-defaults.conf and spark-env.conf override at the service and role level.

apiVersion: spark.stackable.tech/v1alpha1
kind: SparkCluster
metadata:
  name: spark-qs
spec:
  version: "3.0.1"
  config:
    logDir: "file:///stackable/spark/logs"
    enableMonitoring: true
  configOverrides:
    spark-defaults.conf:
      global.override: value2
    spark-env.sh:
      GLOBAL_ENV_VAR: test_value
  masters:
    roleGroups:
      default:
        selector:
          matchLabels:
            kubernetes.io/os: linux
        replicas: 1
        config:
          masterPort: 7078
          masterWebUiPort: 8081
        configOverrides:
          spark-defaults.conf:
            masters.override: value2
          spark-env.sh:
            MASTER_ENV_VAR: test_value
  workers:

When checking the Spark Master configuration I can see the properties added in the role configOverride but not the service level one.

bash-4.4$ cat spark-env.sh
MASTER_ENV_VAR=test_value
SPARK_MASTER_PORT=7078
SPARK_MASTER_WEBUI_PORT=8081
bash-4.4$ cat spark-defaults.conf
masters.override value2
spark.eventLog.dir file:///stackable/spark/logs
spark.eventLog.enabled true
spark.port.maxRetries 0

The operator should allow a user to set a property at the service level that appears in all of the role configuration files. It should also allow the role level configOverrides to take precedence over the service level one.