How CVO can find if the release is a manifestlist payload from image pull spec?

• How do we figure out a release's arch?  Is it "is the release image a manifest-list (with more than one arch entry?)?"?  Is it "is the referenced machine-os-content image a manifest list?"?  Is it "look at a property baked into the layer's release-metadata JSON at build time" (oc adm release info -o json quay.io/openshift-release-dev/ocp-release:4.10.12-x86_64 | jq .metadata)?  Other?

Refer https://github.com/openshift/enhancements/pull/1014