Set system-node-critical priority to Multus Whereabouts IPAM pods
Add `system-node-critical` priority class to Whereabouts IPAM pods, to avoid eviction during resource pressure.
It can be set inside multus helm values:
```yaml
units:
multus:
helmrelease_spec:
values:
rke2-whereabouts:
priorityClassName: system-node-critical
```
issue