Multus uninstallation breaks clusters

Summary

Atfer uninstalling multus on a workload cluster, sylva reconciliation was blocked as some jobs were failing to start:

error: code = Unknown desc = failed to setup network for sandbox "3fedbaf9f1971f4ae67b53ca89431fdb591fcdd5622eb9a92b718928cffd7f73": plugin type="multus" name="multus-cni-network" failed (add): Multus: [kube-system/calico-rke2-chart-cleanup-5bz5t/d973f257-48dd-4c08-8f16-1552d4be8e82]: error waiting for pod: Unauthorized

It is presumably caused by CNI configurations file (/etc/cni/net.d/00-multus.conf) that is installed by multus Daemonsets on nodes but not removed when it is uninstalled.