Add `Feature.enabled?` check

ee/app/helpers/ee/issuables_helper.rb

@@ -47,7 +47,7 @@ module EE
     end
 
     def gitlab_team_member_badge(author, css_class: nil)
-      return unless author.gitlab_employee?
+      return unless author.gitlab_employee? && ::Feature.enabled?(:gitlab_employee_badge)
 
       default_css_class = 'd-inline-block align-middle'
       gitlab_team_member = _('GitLab Team Member')

ee/app/presenters/epic_presenter.rb

@@ -131,7 +131,7 @@ class EpicPresenter < Gitlab::View::Presenter::Delegated
       url: user_path(epic.author),
       username: "@#{epic.author.username}",
       src: author_icon,
-      is_gitlab_employee: epic.author.gitlab_employee?
+      is_gitlab_employee: epic.author.gitlab_employee? && ::Feature.enabled?(:gitlab_employee_badge)
     }
   end
 

ee/app/serializers/ee/note_user_entity.rb

@@ -5,7 +5,7 @@ module EE
     extend ActiveSupport::Concern
 
     prepended do
-      expose :gitlab_employee?, as: :is_gitlab_employee, if: ->(user, options) { user.gitlab_employee? }
+      expose :gitlab_employee?, as: :is_gitlab_employee, if: ->(user, options) { user.gitlab_employee? && ::Feature.enabled?(:gitlab_employee_badge) }
     end
   end
 end