Update 4.15 ovn-kubernetes-microshift image to be consistent with ART

Please review the following PR: https://github.com/openshift/ovn-kubernetes/pull/1883

The PR has been automatically opened by ART (#forum-ocp-art) team automation and indicates
that the image(s) being used downstream for production builds are not consistent
with the images referenced in this component's github repository.

Differences in upstream and downstream builds impact the fidelity of your CI signal.

If you disagree with the content of this PR, please contact @release-artists
in #forum-ocp-art to discuss the discrepancy.

Closing this issue without addressing the difference will cause the issue to
be reopened automatically.