e2e-libvirt is failing due to OpenShiftSDN deprecation:
https://prow.ci.openshift.org/job-history/gs/test-platform-results/pr-logs/directory/pull-ci-openshift-installer-master-e2e-libvirt

example job: https://prow.ci.openshift.org/view/gs/test-platform-results/pr-logs/pull/openshift_installer/7925/pull-ci-openshift-installer-master-e2e-libvirt/1751172149357318144

level=error msg=failed to fetch Master Machines: failed to load asset "Install Config": failed to create install config: invalid "install-config.yaml" file: networking.networkType: Invalid value: "OpenShiftSDN": networkType OpenShiftSDN is deprecated, please use OVNKubernetes

This install config is apparently embedded within the VM image:
https://github.com/ironcladlou/openshift4-libvirt-gcp/blob/rhel8/tools/create-cluster#L68

The vm is created with the vm image in the setup stage:
https://steps.ci.openshift.org/reference/upi-gcp-nested-pre#line43

So the install config needs to be updated and a new image published to use in the job.