chore: cleanup unused config data

- remove token_policies from roles config data, this comes from policies.hcl inputs
- remove policies from ldap groups
- remove backend data from roles, this comes from config.hcl inputs

modules/vault_cluster/main.tf

@@ -61,7 +61,7 @@ module "auth_ldap_group" {
 
   groupname = each.value.groupname
   backend   = each.value.backend
-  policies  = each.value.policies
+  policies  = var.policy_auth_map[each.value.backend][each.value.groupname]
 
   depends_on = [module.auth_ldap_backend]
 }