Add labels to authservice namespace in compliance with charter

Summary

Authservice namespace doesn't have labels consistent with the charter an other namespaces

Relevant logs/screenshots

❯ k get ns --show-labels authservice
NAME          STATUS   AGE    LABELS
authservice   Active   3d2h   app.kubernetes.io/managed-by=Helm,istio-injection=enabled

/cc @micah.nagel

chart/templates/authservice/namespace.yaml

@@ -3,8 +3,11 @@ apiVersion: v1
 kind: Namespace
 metadata:
   name: authservice
-  {{- if .Values.istio.enabled }}
   labels:
+    {{- if .Values.istio.enabled }}
     istio-injection: enabled
-  {{- end }}
-{{- end }}
\ No newline at end of file
+    {{- end }}
+    app.kubernetes.io/name: authservice
+    app.kubernetes.io/component: "core"
+    {{- include "commonLabels" . | nindent 4}}
+{{- end }}