[SPARK-53187] Support SparkCluster event related metrics set

### What changes were proposed in this pull request?

This PR adds SparkCluster as a supported type in metrics and therefore supports publishing execution metrics for it.

### Why are the changes needed?

Operator by default publish metrics by resource type (SparkApplication) - by adding this support, we support the same set of counter and histogram for received event and timed execution

### Does this PR introduce _any_ user-facing change?

More Metrics becomes available for SparkClusters

### How was this patch tested?

From dev sandbox we can see metrics like

```
metrics_operator.sdk_sparkapplication_added_resource_event_Count{type="counters"} 9010
metrics_operator.sdk_sparkapplication_reconciliation_failed_Count{type="counters"} 9
metrics_operator.sdk_sparkapplication_reconciliation_finished_Count{type="counters"} 182841
metrics_operator.sdk_sparkapplication_reconciliation_retries_Count{type="counters"} 9
metrics_operator.sdk_sparkcluster_added_resource_event_Count{type="counters"} 9009
metrics_operator.sdk_sparkcluster_reconciliation_failed_Count{type="counters"} 0
metrics_operator.sdk_sparkcluster_reconciliation_finished_Count{type="counters"} 182821
metrics_operator.sdk_sparkcluster_reconciliation_retries_Count{type="counters"} 0
```

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

No

Closes apache#295 from jiangzho/cluster_metrics.

Authored-by: Zhou JIANG <[email protected]>
Signed-off-by: Peter Toth <[email protected]>

Author: jiangzho

spark-operator/src/main/java/org/apache/spark/k8s/operator/metrics/source/OperatorJosdkMetrics.java

@@ -44,6 +44,7 @@
 
 import org.apache.spark.k8s.operator.BaseResource;
 import org.apache.spark.k8s.operator.SparkApplication;
+import org.apache.spark.k8s.operator.SparkCluster;
 import org.apache.spark.metrics.source.Source;
 import org.apache.spark.util.Clock;
 import org.apache.spark.util.SystemClock;
@@ -305,6 +306,8 @@ private Counter getCounter(Class<?> klass, String... names) {
 
     if (resourceGvk.getKind().equals(SparkApplication.class.getSimpleName())) {
       resourceClass = SparkApplication.class;
+    } else if (resourceGvk.getKind().equals(SparkCluster.class.getSimpleName())) {
+      resourceClass = SparkCluster.class;
     } else {
       return Optional.empty();
     }