[kong] update minimal Enterprise DB-less example

Disable unused services in the minimal Enterprise example:
- It does not use the Portal, but did not disable its Service.
- It does not expose the admin API, so it cannot use Manager, and does
  not need its Service.

Remove the beta warning from the comments. This example does function as
designed, it just intentionally doesn't enable much of anything.

example-values/minimal-kong-enterprise-dbless.yaml

@@ -1,4 +1,3 @@
-# WARNING: this deployment example is currently in beta. It is not suited for production.
 # Basic values.yaml for Kong for Kubernetes with Kong Enterprise (DB-less)
 # Several settings (search for the string "CHANGEME") require user-provided
 # Secrets. These Secrets must be created before installation.
@@ -22,6 +21,14 @@ enterprise:
  rbac:
  enabled: false
 
+manager:
+ enabled: false
+
+portal:
+ enabled: false
+
+portalapi:
+ enabled: false
 
 env:
  database: "off"