[SPARK-49830] Add required fields for sparkApplicationSentinel

[TQJADE]

What changes were proposed in this pull request?

Add the required fields for sparkApplicationSentinel

Why are the changes needed?

Without this, when enable sparkApplicationSentinel, the operator got ERROR

Caused by: io.fabric8.kubernetes.client.KubernetesClientException: Failure executing: PUT at: [https://10.96.0.1:443/apis/spark.apache.org/v1alpha1/namespaces/spark-4/sparkapplications/spark-app-sentinel](https://10.96.0.1/apis/spark.apache.org/v1alpha1/namespaces/spark-4/sparkapplications/spark-app-sentinel). Message: SparkApplication.spark.apache.org "spark-app-sentinel" is invalid: spec.runtimeVersions: Required value. Received status: Status(apiVersion=v1, code=422, details=StatusDetails(causes=[StatusCause(field=spec.runtimeVersions, message=Required value, reason=FieldValueRequired, additionalProperties={})], group=spark.apache.org, kind=SparkApplication, name=spark-app-sentinel, retryAfterSeconds=null, uid=null, additionalProperties={}), kind=Status, message=SparkApplication.spark.apache.org "spark-app-sentinel" is invalid: spec.runtimeVersions: Required value, metadata=ListMeta(_continue=null, remainingItemCount=null, resourceVersion=null, selfLink=null, additionalProperties={}), reason=Invalid, status=Failure, additionalProperties={}).

Does this PR introduce any user-facing change?

no

How was this patch tested?

test locally, modify the values.yaml with sparkApplicationSentinel enabled

Was this patch authored or co-authored using generative AI tooling?

no

[dongjoon-hyun]

+1, LGTM (Pending CIs).
Thank you, @TQJADE .

[dongjoon-hyun]

Merged to master.