Merge branch '409585-create-a-new-organization-model' into 'master'

Create a new Organization model

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/119421



Merged-by: Etienne Baqué <ebaque@gitlab.com>
Approved-by: Krasimir Angelov <kangelov@gitlab.com>
Approved-by: Lorena Ciutacu <lciutacu@gitlab.com>
Approved-by: Vitali Tatarintev <vtatarintev@gitlab.com>
Approved-by: Serena Fang <sfang@gitlab.com>
Approved-by: Etienne Baqué <ebaque@gitlab.com>
Approved-by: Thong Kuah <tkuah@gitlab.com>
Co-authored-by: Alex Pooley <apooley@gitlab.com>