Fix Gitlab/DelegatePredicateMethods offenses

.rubocop_todo/gitlab/delegate_predicate_methods.yml

@@ -2,7 +2,6 @@
 Gitlab/DelegatePredicateMethods:
   Exclude:
   - app/models/clusters/cluster.rb
-  - app/models/clusters/platforms/kubernetes.rb
   - app/models/concerns/ci/metadatable.rb
   - app/models/concerns/diff_positionable_note.rb
   - app/models/concerns/integrations/base_data_fields.rb

app/models/clusters/platforms/kubernetes.rb

@@ -50,12 +50,6 @@ module Clusters
 
       alias_attribute :ca_pem, :ca_cert
 
-      delegate :enabled?, to: :cluster, allow_nil: true
-      delegate :provided_by_user?, to: :cluster, allow_nil: true
-      delegate :allow_user_defined_namespace?, to: :cluster, allow_nil: true
-
-      alias_method :active?, :enabled?
-
       enum_with_nil authorization_type: {
         unknown_authorization: nil,
         rbac: 1,
@@ -66,6 +60,19 @@ module Clusters
 
       nullify_if_blank :namespace
 
+      def enabled?
+        !!cluster&.enabled?
+      end
+      alias_method :active?, :enabled?
+
+      def provided_by_user?
+        !!cluster&.provided_by_user?
+      end
+
+      def allow_user_defined_namespace?
+        !!cluster&.allow_user_defined_namespace?
+      end
+
       def predefined_variables(project:, environment_name:, kubernetes_namespace: nil)
         Gitlab::Ci::Variables::Collection.new.tap do |variables|
           variables.append(key: 'KUBE_URL', value: api_url)