pkg/registry: rename pod logs metrics

The pod_logs subsystem was inadvertently made redundant in the following
kube-apiserver metrics:
- kube_apiserver_pod_logs_pods_logs_backend_tls_failure_total
- kube_apiserver_pod_logs_pods_logs_insecure_backend_total

To safely rename them, it is required to deprecate them in 1.27 whilst
introducing the new metrics replacing them.

Signed-off-by: Damien Grisonnet <dgrisonn@redhat.com>

staging/src/k8s.io/apiserver/pkg/registry/generic/rest/streamer.go

@@ -46,6 +46,10 @@ type LocationStreamer struct {
 	// TLSVerificationErrorCounter is an optional value that will Inc every time a TLS error is encountered.  This can
 	// be wired a single prometheus counter instance to get counts overall.
 	TLSVerificationErrorCounter CounterMetric
+	// DeprecatedTLSVerificationErrorCounter is a temporary field used to rename
+	// the kube_apiserver_pod_logs_pods_logs_backend_tls_failure_total metric
+	// with a one release deprecation period in 1.27.0.
+	DeprecatedTLSVerificationErrorCounter CounterMetric
 }
 
 // a LocationStreamer must implement a rest.ResourceStreamer
@@ -87,6 +91,9 @@ func (s *LocationStreamer) InputStream(ctx context.Context, apiVersion, acceptHe
 		// TODO prefer segregate TLS errors more reliably, but we do want to increment a count
 		if strings.Contains(err.Error(), "x509:") && s.TLSVerificationErrorCounter != nil {
 			s.TLSVerificationErrorCounter.Inc()
+			if s.DeprecatedTLSVerificationErrorCounter != nil {
+				s.DeprecatedTLSVerificationErrorCounter.Inc()
+			}
 		}
 		return nil, false, "", err
 	}