Add arcgis-enterprise-k8s template for Microsoft Azure

[pbobov]

The arcgis-enterprise-k8s template will create and operate ArcGIS Enterprise on Kubernetes deployment in Azure Kubernetes Service (AKS) clusters created by arcgis-site-core/site-k8s-cluster-azure workflow.

Just like arcgis-enterprise-k8s template for AWS, the new arcgis-enterprise-k8s template for Azure should provide the following workflows:

• arcgis-enterprise-k8s-azure-image workflow will build container image for Enterprise Admin CLI and push it to private container registry.
• arcgis-enterprise-k8s-azure-ingress workflow will create Kubernetes namespace for ArcGIS Enterprise on Kubernetes deployment in the AEKS cluster and a cluster-level ingress controller that routes traffic to the deployment.
• arcgis-enterprise-k8s-azure-organization will deploy ArcGIS Enterprise on Kubernetes in the AKS cluster and create an ArcGIS Enterprise organization.
• arcgis-enterprise-k8s-azure-test workflow will tests the ArcGIS Enterprise deployment.
• arcgis-enterprise-k8s-azure-destroy workflow will destroys Azure resources created by arcgis-enterprise-k8s-azure-organization and (optionally) arcgis-enterprise-k8s-azure-ingress workflows.
• arcgis-enterprise-k8s-azure-backup workflow will back up the ArcGIS Enterprise deployment.
• arcgis-enterprise-k8s-azure-restore workflow will restore the ArcGIS Enterprise deployment from backup.

[pbobov]

The template is available at https://github.com/Esri/arcgis-gitops/tree/main/azure/arcgis-enterprise-k8s