Merge branch 'layout-select' into 'master'

Replace layout select setting with radio buttons

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/126895



Merged-by: Natalia Tepluhina <ntepluhina@gitlab.com>
Approved-by: Natalia Tepluhina <ntepluhina@gitlab.com>
Approved-by: Sascha Eggenberger <seggenberger@gitlab.com>
Approved-by: Amy Qualls <aqualls@gitlab.com>
Approved-by: Terri Chu <tchu@gitlab.com>
Reviewed-by: Natalia Tepluhina <ntepluhina@gitlab.com>
Reviewed-by: Terri Chu <tchu@gitlab.com>
Co-authored-by: Annabel Dunstone Gray <annabel.dunstone@gmail.com>