[cern] Removed ovirt image-reference
Starting from OKD 4.18, the ovirt-machine-controllers image is removed. We need to remove this references to be able to use the 4.10 version in OKD 4.18+.
Edited by Katharina Borsig
Starting from OKD 4.18, the ovirt-machine-controllers image is removed. We need to remove this references to be able to use the 4.10 version in OKD 4.18+.