Merge branch 'pb/517368/add-provider-to-saml-group-links' into 'master'

Add provider to saml_group_links

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/182834



Merged-by: Alper Akgun <aakgun@gitlab.com>
Approved-by: Ryan Cobb <rcobb@gitlab.com>
Approved-by: Sincheol (David) Kim <dkim@gitlab.com>
Approved-by: Drew Blessing <drew@gitlab.com>
Approved-by: Alper Akgun <aakgun@gitlab.com>
Reviewed-by: Drew Blessing <drew@gitlab.com>
Reviewed-by: Sincheol (David) Kim <dkim@gitlab.com>
Reviewed-by: Paulo Barros <pbarros@gitlab.com>
Co-authored-by: Paulo Barros <pbarros@gitlab.com>