Append Infra CR with only the GCP PlatformStatus field (without any other fields esp the Spec) set with the LB IPs at the end of the bootstrap ignition. The theory is that when Infra CR is applied from the bootstrap ignition, first the infra manifest is applied. As we progress through all the other assets in the ignition files, Infra CR appears again but with only the LB IPs set. That way it will update the existing Infra CR already applied to the cluster.