add sql wrapper tests, regen

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

client/grpc/gproto/test_micro_rpc.pb.go

@@ -9,6 +9,7 @@ import (
 	proto "go.unistack.org/micro-tests/client/grpc/proto"
 	api "go.unistack.org/micro/v3/api"
 	client "go.unistack.org/micro/v3/client"
+	metadata "go.unistack.org/micro/v3/metadata"
 	server "go.unistack.org/micro/v3/server"
 )
 
@@ -62,6 +63,10 @@ func (s *testClientStream) RecvMsg(msg interface{}) error {
 	return s.stream.Recv(msg)
 }
 
+func (s *testClientStream) Header() metadata.Metadata {
+	return s.stream.Response().Header()
+}
+
 func (s *testClientStream) Send(msg *proto.Request) error {
 	return s.stream.Send(msg)
 }