Update Azure.AKS.Version to detect when AKS LTS is used

[BernieWhite]

Existing rule

Azure.AKS.Version

Suggested rule

Update the rule to support handling for LTS version 1.27 when paid premium plan is active on a cluster.

In the future, Azure.AKS.Version would start failing if AZURE_AKS_CLUSTER_MINIMUM_VERSION is newer then 1.27.x.

However, if the cluster has a premium SKU then this is still supported.

Pillar

Reliability

Additional context

• Long Term Support (LTS)