[FEATURE REQ] Add missing `inUseWithResource` field in IPAddressAvailabilityResult

### API Spec link

https://github.com/Azure/azure-rest-api-specs/blob/main/specification/network/resource-manager/Microsoft.Network/stable/2023-09-01/virtualNetwork.json

### API Spec version

2023-09-01

### Please describe the feature.

Docs page: https://learn.microsoft.com/en-us/rest/api/virtualnetwork/virtual-networks/check-ip-address-availability

When sending request for IP which is currently in use, I get response like this:
```
{
"available": false,
"availableIPAddresses": [
"10.0.2.4",
"10.0.2.5",
"10.0.2.6",
"10.0.2.7",
"10.0.2.8"
],
"isPlatformReserved": false,
"inUseWithResource": "/subscriptions//resourceGroups//providers/Microsoft.Network/networkInterfaces/"
}
```
This response contains extremely helpful field `inUseWithResource`, but this field is not documented anywhere.
It would be great to have it documented and added in SDKs.

Start with specification/network/resource-manager/Microsoft.Network/stable/2023-09-01/virtualNetwork.json, linked in the issue, and compare the IPAddressAvailabilityResult definition with the example response. Done means the inUseWithResource field is represented in the API specification and the requested documentation and SDK surfaces include it.

Written by the indexing model from the issue text.