Merge branch '440807-reinstate-ci-start-using-external-secret-for-add_jh_files_token' into 'master' 

ci: Start using external secret for ADD_JH_FILES_TOKEN

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/144228



Merged-by: David Dieulivol <ddieulivol@gitlab.com>
Approved-by: David Dieulivol <ddieulivol@gitlab.com>
Reviewed-by: Rémy Coutable <remy@rymai.me>
Co-authored-by: Rémy Coutable <remy@rymai.me>