Merge branch 'add-custom-roles-to-saml_providers' into 'master'

Add member_role_id to saml_providers

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/135757



Merged-by: Jarka Košanová <jarka@gitlab.com>
Approved-by: Max Fan <mfan@gitlab.com>
Approved-by: Krasimir Angelov <kangelov@gitlab.com>
Approved-by: Drew Blessing <drew@gitlab.com>
Reviewed-by: Drew Blessing <drew@gitlab.com>
Reviewed-by: Jarka Košanová <jarka@gitlab.com>
Reviewed-by: Krasimir Angelov <kangelov@gitlab.com>
Reviewed-by: Alex Buijs <abuijs@gitlab.com>
Reviewed-by: Max Fan <mfan@gitlab.com>
Co-authored-by: Alex Buijs <abuijs@gitlab.com>