add directives for cni reset in base image. This ensures they are rol…

…led out to target systems as part of the upgrade cycle

(cherry picked from commit 83a51bc)

package/harvester-os/files/system/oem/99_cni_reset.yaml

@@ -0,0 +1,5 @@
+name: "reset container dhcp leases"
+stages:
+   initramfs:
+     - command:
+       - rm -rf /var/lib/cni/networks/k8s-pod-network