address WithBalancerName deleted in grpc v1.46.0 (gazette#324)

* upgrade grpc to v1.47.0 & address deleted WithBalancerName that was deprecated for 2 years grpc/grpc-go#5232

* restore go.mod and go.sum

mainboilerplate/client.go

@@ -2,13 +2,15 @@ package mainboilerplate
 
 import (
 	"context"
+	"fmt"
 	"time"
 
 	grpc_prometheus "github.com/grpc-ecosystem/go-grpc-prometheus"
 	"go.gazette.dev/core/broker/client"
 	pb "go.gazette.dev/core/broker/protocol"
 	pc "go.gazette.dev/core/consumer/protocol"
 	"google.golang.org/grpc"
+	"google.golang.org/grpc/credentials/insecure"
 )
 
 // AddressConfig of a remote service.
@@ -19,8 +21,8 @@ type AddressConfig struct {
 // MustDial dials the server address using a protocol.Dispatcher balancer, and panics on error.
 func (c *AddressConfig) MustDial(ctx context.Context) *grpc.ClientConn {
 	var cc, err = grpc.DialContext(ctx, c.Address.URL().Host,
-		grpc.WithInsecure(),
-		grpc.WithBalancerName(pb.DispatcherGRPCBalancerName),
+		grpc.WithTransportCredentials(insecure.NewCredentials()),
+		grpc.WithDefaultServiceConfig(fmt.Sprintf(`{"loadBalancingConfig": [{"%s":{}}]}`, pb.DispatcherGRPCBalancerName)),
 		// Use a tighter bound for the maximum back-off delay (default is 120s).
 		// TODO(johnny): Make this configurable?
 		grpc.WithBackoffMaxDelay(time.Second*5),

server/server.go

@@ -14,6 +14,7 @@ import (
 	pb "go.gazette.dev/core/broker/protocol"
 	"go.gazette.dev/core/task"
 	"google.golang.org/grpc"
+	"google.golang.org/grpc/credentials/insecure"
 )
 
 // Server bundles gRPC & HTTP servers, multiplexed over a single bound TCP
@@ -83,8 +84,8 @@ func New(iface string, port uint16) (*Server, error) {
 	srv.GRPCLoopback, err = grpc.DialContext(
 		context.Background(),
 		srv.RawListener.Addr().String(),
-		grpc.WithInsecure(),
-		grpc.WithBalancerName(pb.DispatcherGRPCBalancerName),
+		grpc.WithTransportCredentials(insecure.NewCredentials()),
+		grpc.WithDefaultServiceConfig(fmt.Sprintf(`{"loadBalancingConfig": [{"%s":{}}]}`, pb.DispatcherGRPCBalancerName)),
 		// This grpc.ClientConn connects to this server's loopback, and also
 		// to peer server addresses via the dispatch balancer. It has particular
 		// knowledge of what addresses *should* be reach-able (from Etcd