Merge branch '430164-axe-download_buttons_spec' into 'master'

Include axe checks on branches page spec

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/138212



Merged-by: Stan Hu <stanhu@gmail.com>
Approved-by: Paulina Sedlak-Jakubowska <psedlak-jakubowska@gitlab.com>
Approved-by: Ian Baum <ibaum@gitlab.com>
Approved-by: Artur Fedorov <afedorov@gitlab.com>
Approved-by: Tim Noah <tnoah@gitlab.com>
Approved-by: Stan Hu <stanhu@gmail.com>
Reviewed-by: Paulina Sedlak-Jakubowska <psedlak-jakubowska@gitlab.com>
Co-authored-by: Annabel Dunstone Gray <annabel.dunstone@gmail.com>