* feat: remove user from groups on org membership delete
Groups inherently provide authz access to certain resources. If a
user is removed from an organization, they should be removed
from all their groups in said organization.
* chore: prevent removing members from the default organization
Until multi-organizations is released outside an experiment, the
experiment should be backwards compatible.
* chore: move multi-org endpoints into enterprise directory
All multi-organization features are gated behind "premium" licenses. Enterprise licenses can no longer
access organization CRUD.
Steven Masley