Checkmk Werk 15080: Fix the dataset for specific "Site/Host overview" dashlets

ID: 15080 Title: Fix the dataset for specific "Site/Host overview" dashlets Component: Multisite Level: 1 Class: Bug fix Version: 2.3.0b1 In distributed setups, several dashboards showed the "Site overview" dashlet where the "Host overview" makes more sense. This is fixed to always showing hosts, i.e. the "Host overview" dashlet in the following dashboards: LI: all cloud VM dashboards (AWS, Azure, GCP) LI: most Kubernetes dashboards (Cluster, Deployment, DaemonSet, StatefulSet, Namespace) LI: site specific dashboards titled: "Site dashboard <tt>site_name</tt>"