Currently, we release two binaries cmctl and kubectl_cert-manager.
This was introduced in cert-manager/cert-manager#4522.
However, instead of using build-time variables to determine the binary name, we could determine the binary name at runtime (see https://krew.sigs.k8s.io/docs/developer-guide/develop/best-practices/).
That would allow us to simplify the releases, we could then only release a single binary.