This card is about:

• making 4.13 -> 4.14 upgrade compulsory, that is we shouldn't allow an upgrade from a version < 4.14 to a version > 4.14. in order to ensure that the IC upgrade logic on 4.14 is executed.
• removing in CNO 4.15 all the code related to the non-IC to IC upgrade: the logic itself in ovn_kubernetes.go, the operator status hack in pod_status.go, the yamls in the single-zone folder and the yamls (which are mostly symlinks) in the multizone-tmp folder.