Return a status object in Gitlab::GitAccess#git_annex_access_check

Signed-off-by: Rémy Coutable <remy@rymai.me>

lib/gitlab/git_access.rb

@@ -253,7 +253,7 @@ module Gitlab
     end
 
     def git_annex_access_check(project, changes)
-      return false unless Gitlab.config.gitlab_shell.git_annex_enabled
+      return build_status_object(false, "git-annex is disabled") unless Gitlab.config.gitlab_shell.git_annex_enabled
 
       unless user && user_access.allowed?
         return build_status_object(false, "You don't have access")