[gRPC] Migrate raylet client implementation to grpc (#5120)

java/runtime/src/main/java/org/ray/runtime/raylet/RayletClientImpl.java

@@ -37,9 +37,9 @@ public class RayletClientImpl implements RayletClient {
   private long client = 0;
 
   // TODO(qwang): JobId parameter can be removed once we embed jobId in driverId.
-  public RayletClientImpl(String schedulerSockName, UniqueId clientId,
+  public RayletClientImpl(String schedulerSockName, UniqueId workerId,
       boolean isWorker, JobId jobId) {
-    client = nativeInit(schedulerSockName, clientId.getBytes(),
+    client = nativeInit(schedulerSockName, workerId.getBytes(),
         isWorker, jobId.getBytes());
   }