Revert "Temporarily disable auth"

This reverts commit 8977a02.

applications/butler/templates/ingress-authenticated.yaml

@@ -7,8 +7,16 @@ metadata:
 config:
   baseUrl: {{ .Values.global.baseUrl | quote }}
   scopes:
-    anonymous: true
+    all:
+      - "read:image"
   loginRedirect: false
+  # Butler needs a delegated token so that we can query Gafaelfawr for the
+  # user's group membership
+  delegate:
+    internal:
+      service: "butler"
+      scopes: []
+
 template:
   metadata:
     name: "butler"