HCO v1.18.0 release

[Nahshon Unna Tsameret]

HCO v1.18.0 is now available.

Notable changes:

• introducing of the v1 API version for the HyperConverged custom resource. 
  This API version is not backward compatible. This version contains a conversion webhook so the v1beta1 api version is still usable. However, Kubernetes behavior when having two version, is to use the latest one if not specified, and that may break things.
  
  It is required to use the full versioned type name when working with v1beta1. For example, in yaml files, this is part of the file (in the apiVersion filed. But when reading, patching or editing from command line, it should be used similar to this:
  
  $ oc get hyperconvergeds.v1beta1.hco.kubevirt.io -n kubevirt-hyperconverged kubevirt-hyperconverged -o yaml
  
  
• The decentralizedLiveMigration feature gate was graduated to beta, and is enabled by default
• introduce the incrementalBackup feature gate. It is disabled by default. When enabled, HCO enables the UtilityVolumes and the UtilityVolumes feature gates in KubeVirt
• Expose HypervisorConfigurations to HyperConveged CR
• Add an option to opt-out from kubevirt RBAC aggregation through HyperConveged CR
• Add AIE (Accelerated Infrastructure Enablement) webhook support as an HCO-managed operand.
• HCO sets the LiveUpdateNADRef feature gate in KubeVirt CR
• Set the default architecture in the KubeVirt CR: HCO select the default architecture according to the current status of the cluster nodes, and set updates the KubeVirt CR

The release notes, full changes list and the contributors list are here: https://github.com/kubevirt/hyperconverged-cluster-operator/releases/tag/v1.18.0.