As part of our dual stream efforts the `oc adm` command needs to be able to handle mutliple images in the release payload that have the machine-os labels.

We need to modify the `oc adm` source code to not break in the case of multiple images in the payload that have these labels and act appropriately.

https://github.com/openshift/oc/blob/894e94b93fb8776706bf25c6b19dd04358f39e6a/pkg/cli/admin/release/new.go#L58