Fix worker schema

- We accidentally duplicated the `kubernetes` section, one of which was
missing new keys we added over time and would sometimes be used instead
of the correct, latest one
- The new/correct schema was missing the `workloads_namespace` key as
well though

[#171826991]

Co-authored-by: Jaskanwal Pawar <jpawar@pivotal.io>
Co-authored-by: Jennifer Spinney <jspinney@pivotal.io>

Author: Jaskanwal Pawar

lib/cloud_controller/config_schemas/worker_schema.rb

@@ -173,6 +173,7 @@ class WorkerSchema < VCAP::Config
               token_file: String,
             },
             ca_file: String,
+            workloads_namespace: String,
             optional(:kpack) => {
               builder_namespace: String,
               registry_service_account_name: String,
@@ -203,15 +204,6 @@ class WorkerSchema < VCAP::Config
           max_labels_per_resource: Integer,
           max_annotations_per_resource: Integer,
           internal_route_vip_range: String,
-
-          optional(:kubernetes) => {
-            host_url: String,
-            service_account: {
-              token_file: String,
-            },
-            ca_file: String,
-            workloads_namespace: String,
-          },
         }
       end
       # rubocop:enable Metrics/BlockLength