Add CODEOWNERS to engineering productivity review

lib/gitlab/danger/helper.rb

@@ -170,6 +170,7 @@ module Gitlab
         %r{\A(ee/)?(danger/|lib/gitlab/danger/)} => :engineering_productivity,
         %r{\A(ee/)?scripts/} => :engineering_productivity,
         %r{\Atooling/} => :engineering_productivity,
+        %r{(CODEOWNERS)} => :engineering_productivity,
 
         %r{\A(ee/)?app/(?!assets|views)[^/]+} => :backend,
         %r{\A(ee/)?(bin|config|generator_templates|lib|rubocop)/} => :backend,

spec/lib/gitlab/danger/helper_spec.rb

@@ -242,6 +242,7 @@ RSpec.describe Gitlab::Danger::Helper do
       '.editorconfig'                                         | [:engineering_productivity]
       'tooling/overcommit/foo'                                | [:engineering_productivity]
       '.codeclimate.yml'                                      | [:engineering_productivity]
+      '.gitlab/CODEOWNERS'                                    | [:engineering_productivity]
 
       'lib/gitlab/ci/templates/Security/SAST.gitlab-ci.yml'   | [:backend]