[AVM Module Issue]: 0.5.1~0.8.3 incompatible with BYO vnet PodSubnetID `container-service/managed-cluster`

### Check for previous/existing GitHub issues

- [x] I have checked for previous/existing GitHub issues

### Issue Type?

Bug

### Module Name

avm/res/container-service/managed-cluster

### (Optional) Module Version

0.5.1

### Description

0.8.3 ❌ braking change is still included
0.5.1 ❌ introduced a braking change when used with BYO vnet "PodSubnetID"
0.5.0 ✅ worked fine previously

```
primaryAgentPoolProfiles: [
{
vnetSubnetResourceId: aksSystemNodeSubnet.id
podSubnetResourceId: aksSystemPodSubnet.id
// other config omitted..
}
]
agentPools: [
{
vnetSubnetResourceId: aksUserNodeSubnet.id
podSubnetResourceId: aksUserPodSubnet.id
// other config omitted..
}
]

networkDataplane: 'cilium'
networkPlugin: 'azure'
networkPluginMode: null
```

which results with the following error:
```
Preflight validation check for resource(s) for container service myakscluster in resource group myresourcegroup failed.
Message: NetworkPluginMode overlay cannot be used with PodSubnetID.
Details: (Code: BadRequest)
```

### (Optional) Correlation Id

_No response_