HPCC-26411 Remove default dependency on an installed k8s LDAP secret by default

Signed-off-by: Jake Smith <jake.smith@lexisnexisrisk.com>

helm/hpcc/values.yaml

@@ -220,9 +220,9 @@ secrets:
     ## For example, to set the secret associated with the azure storage account "mystorageaccount" use
     ##azure-mystorageaccount: storage-myazuresecret
 
-  authn:
+  authn: {}
     ## Category to deploy authentication secrets to container, and to create a key name alias to reference those secrets
-    ldapadmincredskey: "myk8sldapadmincreds"  ## Default k/v for LDAP authentication secrets
+    #ldapadmincredskey: "myk8sldapadmincreds"  ## Default k/v for LDAP authentication secrets
 
   ecl: {}
     ## Category for secrets published to all components that run ecl