blank volume snapshots list

### problem

After deleting a VM I noticed that there was still a volume snapshot of the deleted VM so I tried to delete the volume snapshot too but it failed.
Now when I click on "Volume Snapshots" the following error is displayed:
> Cannot invoke "com.cloud.storage.VolumeVO.getRemoved()" because "volumeVO" is null

and no snapshots are displayed in the list.

### versions

CloudStack 4.22.1.0 on Rocky Linux 10.
Ceph storage.

### The steps to reproduce the bug

1. I think the error was triggered forcing the deletion of a VM which had a volume snapshot
2. delete the volume snapshot of the deleted VM
3.
...

### What to do about it?

_No response_

No se indica ningún archivo ni prueba. Empieza reproduciendo el fallo siguiendo los pasos indicados en CloudStack 4.22.1.0 con Ceph y, después, sigue el flujo de la lista de Volume Snapshots a partir de la excepción null VolumeVO notificada. Se considera terminado cuando la lista se carga sin el error y gestiona los snapshots cuya VM o volumen se haya eliminado.

Escrito por el modelo de indexación a partir del texto del issue.