fix: generate cpp grpc services (#64)

c++/greptime/v1/common.grpc.pb.cc

@@ -0,0 +1,27 @@
+// Generated by the gRPC C++ plugin.
+// If you make any local change, they will be lost.
+// source: greptime/v1/common.proto
+
+#include "greptime/v1/common.pb.h"
+#include "greptime/v1/common.grpc.pb.h"
+
+#include <functional>
+#include <grpcpp/support/async_stream.h>
+#include <grpcpp/support/async_unary_call.h>
+#include <grpcpp/impl/channel_interface.h>
+#include <grpcpp/impl/client_unary_call.h>
+#include <grpcpp/support/client_callback.h>
+#include <grpcpp/support/message_allocator.h>
+#include <grpcpp/support/method_handler.h>
+#include <grpcpp/impl/rpc_service_method.h>
+#include <grpcpp/support/server_callback.h>
+#include <grpcpp/impl/codegen/server_callback_handlers.h>
+#include <grpcpp/server_context.h>
+#include <grpcpp/impl/service_type.h>
+#include <grpcpp/support/sync_stream.h>
+namespace greptime {
+namespace v1 {
+
+}  // namespace greptime
+}  // namespace v1
+