[HUDI-2849] Improve SparkUI job description for write path (#4222)

hudi-utilities/src/main/java/org/apache/hudi/utilities/deltastreamer/DeltaSync.java

@@ -441,6 +441,7 @@ public class DeltaSync implements Serializable {
       return null;
     }
 
+    jssc.setJobGroup(this.getClass().getSimpleName(), "Checking if input is empty");
     if ((!avroRDDOptional.isPresent()) || (avroRDDOptional.get().isEmpty())) {
       LOG.info("No new data, perform empty commit.");
       return Pair.of(schemaProvider, Pair.of(checkpointStr, jssc.emptyRDD()));