fix: add timeout configuration in grpc dial function (go-kratos#3365)

Co-authored-by: huangzw <huangzw@2345.com>

transport/grpc/client.go

@@ -190,6 +190,7 @@ func dial(ctx context.Context, insecure bool, opts ...ClientOption) (*grpc.Clien
 				discovery.NewBuilder(
 					options.discovery,
 					discovery.WithInsecure(insecure),
+					discovery.WithTimeout(options.timeout),
 					discovery.WithSubset(options.subsetSize),
 					discovery.PrintDebugLog(options.printDiscoveryDebugLog),
 				)))