feat: consistent hash balancer support (#5246)

Co-authored-by: 周曙光 <zsg@zhoushuguangdeMacBook-Pro.local>

zrpc/internal/client.go

@@ -7,7 +7,6 @@ import (
 	"strings"
 	"time"
 
-	"github.com/zeromicro/go-zero/zrpc/internal/balancer/p2c"
 	"github.com/zeromicro/go-zero/zrpc/internal/clientinterceptors"
 	"github.com/zeromicro/go-zero/zrpc/resolver"
 	"google.golang.org/grpc"
@@ -53,9 +52,6 @@ func NewClient(target string, middlewares ClientMiddlewaresConf, opts ...ClientO
 		middlewares: middlewares,
 	}
 
-	svcCfg := fmt.Sprintf(`{"loadBalancingPolicy":"%s"}`, p2c.Name)
-	balancerOpt := WithDialOption(grpc.WithDefaultServiceConfig(svcCfg))
-	opts = append([]ClientOption{balancerOpt}, opts...)
 	if err := cli.dial(target, opts...); err != nil {
 		return nil, err
 	}