Description of problem:
Adding the DV annotation
'cdi.kubevirt.io/storage.pod.retainAfterCompletion: "true"'
should cause CDI transfer pods (importer, uploader, cloner) to be retained after a successful or failed completion.

Alexander noticed that adding this annotation triggers a non-Populators flow.

It means that some of the tier1 tests are not running with Populators flow.

We should consider it as a blocker for 4.14.

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

How reproducible:
Always

Steps to Reproduce:
1. Add annotation to the DV:
'cdi.kubevirt.io/storage.pod.retainAfterCompletion: "true"'
2. See DV/PVC annotation - Populators were not used

Actual results:
non-populators flow

Expected results:
populators flow