We ended up running into a problem with nodepool built control plane
images (has to do with boot from volume not allowing us to delete images
that are in use by a nova instance). We have decided to clean this up
and go back to not doing this until we can do it more properly.
Note this isn't a revert because having a group for access to control
plane clouds does seem like a good idea in general and I believe there
have been changes we'd have to resolve in the clouds.yaml files anyway.
Depends-On: https://review.opendev.org/#/c/665012/
Change-Id: I5e72928ec2dec37afa9c8567eff30eb6e9c04f1d
ffcd1791bf