Update gitaly/v14/client to 2e398afa0490ccdf5a82e1a7c7d824ae491eba16

This updates the Gitaly client go.mod dependency to Gitaly commit
2e398afa0490ccdf5a82e1a7c7d824ae491eba16. This causes a grpc-go
version bump, and hence a minor change in some of our test code.

client/testserver/gitalyserver.go

@@ -13,7 +13,10 @@ import (
 	"google.golang.org/grpc/metadata"
 )
 
-type TestGitalyServer struct{ ReceivedMD metadata.MD }
+type TestGitalyServer struct {
+	ReceivedMD metadata.MD
+	pb.UnimplementedSSHServiceServer
+}
 
 func (s *TestGitalyServer) SSHReceivePack(stream pb.SSHService_SSHReceivePackServer) error {
 	req, err := stream.Recv()

go.mod

@@ -11,10 +11,10 @@ require (
 	github.com/pires/go-proxyproto v0.6.0
 	github.com/prometheus/client_golang v1.10.0
 	github.com/stretchr/testify v1.7.0
-	gitlab.com/gitlab-org/gitaly/v14 v14.0.0-rc1
+	gitlab.com/gitlab-org/gitaly/v14 v14.6.0-rc1.0.20220121102056-2e398afa0490
 	gitlab.com/gitlab-org/labkit v1.7.0
-	golang.org/x/crypto v0.0.0-20201221181555-eec23a3978ad
+	golang.org/x/crypto v0.0.0-20210711020723-a769d52b0f97
 	golang.org/x/sync v0.0.0-20210220032951-036812b2e83c
-	google.golang.org/grpc v1.37.0
+	google.golang.org/grpc v1.38.0
 	gopkg.in/yaml.v2 v2.4.0
 )