Fix Gitlab/DelegatePredicateMethods offenses

Changelog: other

.rubocop_todo/gitlab/delegate_predicate_methods.yml

@@ -6,7 +6,6 @@ Gitlab/DelegatePredicateMethods:
   - app/models/concerns/ci/metadatable.rb
   - app/models/concerns/diff_positionable_note.rb
   - app/models/concerns/integrations/base_data_fields.rb
-  - app/models/concerns/resolvable_discussion.rb
   - app/models/project.rb
   - ee/app/models/concerns/ee/ci/metadatable.rb
   - ee/app/models/ee/group.rb

app/models/concerns/resolvable_discussion.rb

@@ -30,11 +30,14 @@ module ResolvableDiscussion
 
     delegate  :resolved_at,
               :resolved_by,
-              :resolved_by_push?,
               to: :last_resolved_note,
               allow_nil: true
   end
 
+  def resolved_by_push?
+    !!last_resolved_note&.resolved_by_push?
+  end
+
   def resolvable?
     strong_memoize(:resolvable) do
       potentially_resolvable? && notes.any?(&:resolvable?)