Merge branch 'add-dev-env-or-dot-to-gon' into 'master'

Add Gitlab.dev_env_or_com? to gon

See merge request gitlab-org/gitlab!73133

lib/gitlab/gon_helper.rb

@@ -39,6 +39,7 @@ module Gitlab
       gon.ee                     = Gitlab.ee?
       gon.jh                     = Gitlab.jh?
       gon.dot_com                = Gitlab.com?
+      gon.dev_env_or_com         = Gitlab.dev_env_or_com?
 
       if current_user
         gon.current_user_id = current_user.id