I want to create a domain and have all `_creator` permissions assigned at the domain level

Use case

1. Assume I have a non-admin user, e.g. named user, who has permissions enough to create a domain
2. Have that user create the domain foo
3. I have the RPM plugin installed
4. I want the user foo to automatically receive all _creator permissions

What I imagine the solution to be

I don't think so. The closest I think we can get is to:

1. Create a new custom Role containing the permissions we want assigned at the domain level. For example a new role called RPMAdmin and it gets the 6 RPM add permissions for the RPMRemote, RPMRepository, etc...
2. Have the DomainAccessPolicy creation_hooks get a new hook on the installation which assigns the RPMAdmin role to the user creating the domain as a "domain-level" Role.

Can we do this today?

No, because there isn't a code function I can use to configure as the target of the creation_hooks. I would need to provide custom code.

Start with DomainAccessPolicy and the creation_hooks definition in pulpcore/app/viewsets/domain.py around line 81, then review how domain-level roles and _creator permissions are represented. Determine how an installation could configure a hook that assigns a custom role to the user creating a domain; done means the behavior can be configured without custom code.