Deleting a user/spawner does not result in the removal of the legacy PVC

[BigFlagBurito]

Bug description

I have a few users who still have legacy PVC names.
When I delete one of these users, the PVC is not deleted. As far as I can tell from the log, the system only attempts to delete a PVC with the new slug_scheme.

How to reproduce

1. Have a user with a legacy PVC name.
2. Delete the user

Expected behaviour

The PVC from the user is deleted.

Actual behaviour

No PVC is delted.

Your personal set up

• I deploy JupyterHub using the official Helm chart on a Kubernetes cluster
• The Helm Chart Version is 4.4.0 and the App Version is 5.5.0.