Use grpc.NewClient instead of the deprecated Dial method

internal/netutil/grpc_client.go

@@ -48,7 +48,7 @@ func (c *grpcConnCache) Dial(addr string, opts ...grpc.DialOption) (*grpc.Client
 
 	fullOpts := append([]grpc.DialOption{}, c.opts...)
 	fullOpts = append(fullOpts, opts...)
-	conn, err := grpc.Dial(addr, fullOpts...)
+	conn, err := grpc.NewClient(addr, fullOpts...)
 	if err != nil {
 		return nil, err
 	}