Upgrade of EKSA Cluster with Prior VM template expects a wrong tag on the VM Template

**What happened**:

I was trying to scale my EKSA Cluster in VMC which was created a while ago. I was trying to update the worker nodes size to 3 and was trying run the `eksctl anywhere upgrade cluster -f eksa-cluster.yaml` and im getting the below error which is not making any sense to me.
❯ eksctl anywhere upgrade cluster -f eksa-cluster.yaml ─╯
Performing setup and validations
✅ Connected to server
✅ Authenticated to vSphere
✅ Datacenter validated
✅ Network validated
✅ Datastore validated
✅ Folder validated
✅ Resource pool validated
✅ Datastore validated
✅ Folder validated
✅ Resource pool validated
✅ Datastore validated
✅ Folder validated
✅ Resource pool validated
❌ Validation failed {"validation": "vsphere Provider setup is valid", "error": "template /SDDC-Datacenter/vm/Templates/eks-a-templates/ubuntu-v1.21.5-eks-d-1-21-8-eks-a-6-amd64 is missing tag eksdRelease:kubernetes-1-21-eks-13", "remediation": ""}

**What you expected to happen**:
The tag expectation of the image wasnt correct, it should have passed through the error.

**How to reproduce it (as minimally and precisely as possible)**: Try to upgrade your older cluster increasing the size of the worker nodes

**Anything else we need to know?**:

**Environment**:
- EKS Anywhere Release:
- EKS Distro Release:

The payload names no source files or tests. Start by reproducing the older-cluster upgrade with `eksctl anywhere upgrade cluster -f eksa-cluster.yaml` and inspect the validation that reports the missing `eksdRelease:kubernetes-1-21-eks-13` tag; done means the prior VM template's tag expectation is handled correctly.

Written by the indexing model from the issue text.