Checkmk Werk 11121: Proxmox: add node info check

ID: 11121 Title: Proxmox: add node info check Component: Checks & agents Level: 2 Class: New feature Version: 1.7.0i1 This check is OK when a given Proxmox node's `status` and it's subscription 'status' match the given configured values, WARN otherwise. It shows the node status, subscription status, Proxmox version and number of hosted VMs.