Description of problem:
Wrong error message when attempting to upload an image to a PVC that already has disk.img

Version-Release number of selected component (if applicable):
4.14, 4.15

How reproducible:
Always, starting from CNV-v4.14.0.rhel9-1959 (maybe earlier, we only know it worked in the build 1905)

Steps to Reproduce:
1. Upload an image with virtctl - completed successfully / (or import a DV/PVC)

$ virtctl image-upload dv cnv-3729 --image-path=./cirros-0.4.0-x86_64-disk.qcow2 --size=1Gi --storage-class=ocs-storagecluster-ceph-rbd-virtualization --access-mode=ReadWriteMany --insecure --block-volume

2. Run 'virtctl image-upload' command attempting to upload an image to the same PVC

3. See the result:
Unable to get PVC Prime default/cnv-3729

Actual results:
'Unable to get PVC Prime default/cnv-3729'

Expected results:
'PVC cnv-3729 already successfully imported/cloned/updated'

Additional info:
This change happened in the recent builds:
CNV-v4.14.0.rhel9-1905 - Passed (Sep 10)
CNV-v4.14.0.rhel9-1959 - Failed (Sep 16)