This is a clone of issue OCPBUGS-23131. The following is the description of the original issue:
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The final iteration (of 3) of the fix for OCPBUGS-4248 - https://github.com/openshift/cluster-baremetal-operator/pull/341 - uses the (IPv6) API VIP as the IP address for IPv6 BMCs to contact Apache to download the image to mount via virtualmedia.

When the provisioning network is active, this should use the (IPv6) Provisioning VIP unless the virtualMediaViaExternalNetwork flag is true.