Remove support of ~group::not owned label
As proposed in gitlab-com/www-gitlab-com#14321 (closed), we will stop the support of the ~"group::not_owned" label. Let's remove this label from our automations. See the following link for occurrences of this label in our codebase:
Do not proceed until we agree to move forward with gitlab-com/www-gitlab-com#14321 (closed)
Edited by Jennifer Li