After replacement CRD api version to v1 (original Enhancement https://issues.redhat.com/browse/ENTESB-15801), we will lost a support for OCP 3.11 since 3.11 uses kubernetes Version: v1.11.0 (apiextensions.k8s.io/v1 is since v1.16).
After that, creation of CRD in 3.11 would fail (error: unable to recognize "": no matches for kind "CustomResourceDefinition" in version "apiextensions.k8s.io/v1").
If we want to support 3.11 after that change, we need to have two CRD for both platforms (OCP4 and OCP3) and they need to be distinguish (somehow) during the installation.