Unable to upgrade cluster after changing network path in vmware

**What happened**:
After changing network path in vmware (/cluster/network/eks to /cluster/network/qual/eks ), i'm unable to upgrade cluster.

✅ Connected to server
✅ Authenticated to vSphere
✅ Datacenter validated
❌ Validation failed {"validation": "vsphere provider validation", "error": "network /cluster/network/eks not found", "remediation": ""}

After changing network in config

✅ Cluster CRDs ready
✅ Cluster object present on workload cluster
✅ Upgrade cluster kubernetes version increment
✅ Validate authentication for git provider
❌ Validation failed {"validation": "upgrade preflight validations pass", "error": "validation failed with 1 errors: spec.network is immutable. Previous value /cluster/network/eks, new value /cluster/network/qual/eks", "remediation": ""}
Error: failed to upgrade cluster: validations failed

I tried to change the value manually :

```
kubectl get vspheredatacenterconfigs.anywhere.eks.amazonaws.com mgmt -o yaml > /tmp/vspheredatacenterconfigs.yaml

vim /tmp/vspheredatacenterconfigs.yaml

kubectl apply -f /tmp/vspheredatacenterconfigs.yaml
The VSphereDatacenterConfig "mgmt" is invalid: spec.network: Invalid value: "/cluster/network/qual/eks": field is immutable
```

After, I tried deleting the object to recreate it :

```
kubectl delete vspheredatacenterconfigs.anywhere.eks.amazonaws.com mgmt
vspheredatacenterconfig.anywhere.eks.amazonaws.com "mgmt" deleted

kubectl apply -f /tmp/vspheredatacenterconfigs.yaml

Error from server (BadRequest): error when creating "/tmp/vspheredatacenterconfigs.yaml": admission webhook "validation.vspheredatacenterconfig.anywhere.amazonaws.com" denied the request: Creating new VSphereDatacenterConfig on existing cluster is not supported
```

does it mean that i have to recreate the cluster ?

**What you expected to happen**:

Changing network in vmware don't affect upgrade operation

**How to reproduce it (as minimally and precisely as possible)**:
Change network path in vmware and try to upgrade cluster

**Environment**:
- EKS Anywhere Release:
eksctl version
0.111.0-dev+9a99e9218.2022-09-09T18:36:17Z

bottlerocket-v1.23.9-kubernetes-1-23-eks-5-amd64

- Vmware
vSphere Client version 7.0.3

Start by tracing the upgrade preflight validation and the VSphereDatacenterConfig admission validation described in the report. Reproduce the network-path change followed by an upgrade, then determine the supported outcome for an existing cluster and verify it with the relevant validation or upgrade tests; done means the behavior is corrected or the limitation is clearly documented.

Written by the indexing model from the issue text.