Allow for non-NamedModelViewsets to be added to the RBAC system.

[gerrod3]

Currently only NamedModelViewSet (NMV) can be fully added to Pulp's RBAC system. The ability to customize the AccessPolicy, define default roles and use object creation hooks are restricted to NMVs. This is due to the post-migrate hooks at startup that only look through registered NMVs.

pulpcore/pulpcore/app/apps.py

Lines 131 to 136 in 1f28641

	post_migrate.connect(
	_populate_access_policies,
	sender=self,
	dispatch_uid="populate_access_policies_identifier",
	)
	post_migrate.connect(_populate_roles, sender=self, dispatch_uid="populate_roles_identifier")

Also, our permission class AccessPolicyFromDB is expecting NMVs in order to work.

pulpcore/pulpcore/app/access_policy.py

Lines 25 to 29 in 1f28641

	try:
	urlpattern = get_view_urlpattern(view)
	except AttributeError:
	# The view does not define a `urlpattern()` method, e.g. it's not a NamedModelViewset
	return None

If we want to add RBAC to non-NMVs (like orphan cleanup #1924), we will need to redesign portions of this system to make it easier to add support without turning every view into a NMV.