Update multus script to recognize scos

This comes up when installing ipi-on-aws on arm64 with the custom payload build at quay.io/aleskandrox/okd-release:4.12.0-0.okd-centos9-full-rebuild-arm64 that is using scos as machine-content-os image

```

[root@ip-10-0-135-176 core]# crictl logs c483c92e118d8
2022-08-11T12:19:39+00:00 [cnibincopy] FATAL ERROR: Unsupported OS ID=scos
```

The probable fix has to land on https://github.com/openshift/cluster-network-operator/blob/master/bindata/network/multus/multus.yaml#L41-L53