address review comments

Author: m-nagarajan

clients/da-vinci-client/src/main/java/com/linkedin/davinci/stats/KafkaConsumerServiceOtelMetricEntity.java

@@ -60,7 +60,7 @@ public enum KafkaConsumerServiceOtelMetricEntity implements ModuleMetricEntityIn
   ),
 
   ORPHAN_TOPIC_PARTITION_COUNT(
-      "ingestion.pubsub.consumer.topic.partition.orphan_count", MetricType.COUNTER, MetricUnit.NUMBER,
+      "ingestion.pubsub.consumer.orphan_subscription_count", MetricType.COUNTER, MetricUnit.NUMBER,
       "Count of topic-partitions assigned to consumer with no running ingestion task", setOf(VENICE_CLUSTER_NAME)
   ),
 

clients/da-vinci-client/src/test/java/com/linkedin/davinci/stats/KafkaConsumerServiceOtelMetricEntityTest.java

@@ -101,7 +101,7 @@ private static Map<KafkaConsumerServiceOtelMetricEntity, MetricEntityExpectation
     map.put(
         ORPHAN_TOPIC_PARTITION_COUNT,
         new MetricEntityExpectation(
-            "ingestion.pubsub.consumer.topic.partition.orphan_count",
+            "ingestion.pubsub.consumer.orphan_subscription_count",
             MetricType.COUNTER,
             MetricUnit.NUMBER,
             "Count of topic-partitions assigned to consumer with no running ingestion task",