Description of problem:

The current default IBI (Image-Based Installation) templates provided by the SiteConfig operator assume that BareMetalHosts exist in the same namespace as the ClusterInstance. However, the ClusterInstance.spec.nodes.hostRef field allows referencing BareMetalHosts from different namespaces.

When a hostRef points to a BareMetalHost in another namespace, the templates fail to resolve the reference correctly, leading to deployment errors. This restricts flexibility and prevents users from organizing BareMetalHosts in dedicated namespaces separate from the ClusterInstance.

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