To get ClusterDeployment, which is a prerequisite, one needs to first olm install https://operatorhub.io/operator/hive-operator
After https://github.com/openshift/assisted-service/pull/1422 the operator deployment will not require ClusterDeployments (or BareMetalHosts) but the operand -- the result of creating an AgentServiceConfig CR -- will require it.
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory (OpenShift Container Platform 4.8.3 bug fix update), and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHBA-2021:2896