NFD's CSV, image-references, and nfd.package.yaml still reference 4.14 while art.yaml directs looking for 4.15 to replace.

These references must be updated before this operator can be pre-released (hopefully with ec.1). Until then, cluster-nfd-operator will be disabled in 4.15. You can use this bug to fix that and file a PR to revert https://github.com/openshift-eng/ocp-build-data/pull/3722/commits/39c79fc1a5893d0f3e71533f1f65573659e3079c to re-enable it after an ARTist has tested the fix (alert @release-artists in #forum-ocp-art).