Merge branch '411832-namespace-org-validation-improve-specs-2' into 'master'

Improve tests for require_organization logic

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/160360



Merged-by: drew stachon <730684-drew@users.noreply.gitlab.com>
Approved-by: drew stachon <730684-drew@users.noreply.gitlab.com>
Co-authored-by: Rutger Wessels <rwessels@gitlab.com>