Delete the image (e2e_be_fe)

1. Select an image with state active.
2. Delete the image.
3. Create another image with same name.
4. Delete the newly created image.
5. Delete an image with failed state

Expected Results

1. The image should be deleted successfully. Check the CRDS VirtualMachineImage.
2. User should be able to create a new image with same name.
3. Check the backing image in Longhorn.