`cilium upgrade` doesn't support AKS

[pchaigno]

$ ./cilium upgrade --agent-image docker.io/pchaigno/cilium-dev:xfrm-config-update --operator-image docker.io/pchaigno/operator-azure:xfrm-config-update
🔮 Auto-detected Kubernetes kind: AKS
✅ Derived Azure subscription ID 22716d91-fb67-4a07-ac5f-d36ea49d6167 from subscription cilium-dev
❌ Azure resource group is required, please specify --azure-resource-group

Error: Unable to upgrade Cilium:  missing Azure resource group name
$ ./cilium upgrade --azure-subscription "${SUBSCRIPTION}" --azure-resource-group "${NAME}" --agent-image docker.io/pchaigno/cilium-dev:xfrm-config-update --operator-image docker.io/pchaigno/operator-azure:xfrm-config-update
unknown flag: --azure-subscription

[github-actions[bot]]

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