need to limit range of ip address prefix-length

OCP version: 4.14.0-0.nightly-2023-06-30-131338
knmstate operator version: kubernetes-nmstate-operator.4.14.0-202307041530

100%

1. install knmstate operator
2. login web console, Networking -> NodeNetworkConfigurationPolicy, click Create, select From Form, set policy name, add a linux bridge, set ipv4 address, set prefix-length as 33
3. click Create

nncp is created with the invalid prefix-length

limit the range of prefix-length can be set 

HTTP POST:

{
    "apiVersion": "nmstate.io/v1",
    "kind": "NodeNetworkConfigurationPolicy",
    "metadata": {
        "name": "policy-ip"
    },
    "spec": {
        "desiredState": {
            "interfaces": [
                {
                    "ipv4": {
                        "address": [
                            {
                                "ip": "10.3.4.4",
                                "prefix-length": 33
                            }
                        ],
                        "enabled": true
                    },
                    "name": "br0",
                    "state": "up",
                    "type": "linux-bridge"
                }
            ]
        }
    }
}