refactor: Refactor rpc call && auto gen rpc_call code (#2969)

* refactor: rpcclient

* chore: err

* fix: err

* fix: err

* fix: err

* feat: change api

pkg/common/startrpc/start.go

@@ -27,6 +27,7 @@ import (
 	"time"
 
 	conf "github.com/openimsdk/open-im-server/v3/pkg/common/config"
+	"github.com/openimsdk/open-im-server/v3/pkg/rpcclient"
 	"github.com/openimsdk/tools/discovery/etcd"
 	"github.com/openimsdk/tools/utils/datautil"
 	"github.com/openimsdk/tools/utils/jsonutil"
@@ -95,6 +96,10 @@ func Start[T any](ctx context.Context, discovery *conf.Discovery, prometheusConf
 	defer client.Close()
 	client.AddOption(mw.GrpcClient(), grpc.WithTransportCredentials(insecure.NewCredentials()), grpc.WithDefaultServiceConfig(fmt.Sprintf(`{"LoadBalancingPolicy": "%s"}`, "round_robin")))
 
+	if err = rpcclient.InitRpcCaller(client, discovery.RpcService); err != nil {
+		return err
+	}
+
 	// var reg *prometheus.Registry
 	// var metric *grpcprometheus.ServerMetrics
 	if prometheusConfig.Enable {