Update generated files

stress/grpc_testing/metrics.pb.go

@@ -205,7 +205,7 @@ var _ grpc.ClientConn
 
 // This is a compile-time assertion to ensure that this generated file
 // is compatible with the grpc package it is being compiled against.
-const _ = grpc.SupportPackageIsVersion2
+const _ = grpc.SupportPackageIsVersion3
 
 // Client API for MetricsService service
 
@@ -335,6 +335,7 @@ var _MetricsService_serviceDesc = grpc.ServiceDesc{
 			ServerStreams: true,
 		},
 	},
+	Metadata: fileDescriptor0,
 }
 
 func init() { proto.RegisterFile("metrics.proto", fileDescriptor0) }