Merge branch '451661-add-fallback-yaml' into 'master'

Add fallback property to yaml

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/149151



Merged-by: Artur Fedorov <afedorov@gitlab.com>
Approved-by: Rajan Mistry <rmistry@gitlab.com>
Approved-by: Dominic Bauer <dbauer@gitlab.com>
Approved-by: Artur Fedorov <afedorov@gitlab.com>
Reviewed-by: Alexander Turinske <aturinske@gitlab.com>
Reviewed-by: Artur Fedorov <afedorov@gitlab.com>
Reviewed-by: Rajan Mistry <rmistry@gitlab.com>
Co-authored-by: Alexander Turinske <aturinske@gitlab.com>