Azure ML Serving Stack: AKS cluster with node pool

[oginskis]

Create or update existing components to deploy:

• [x] Azure Kubernetes Service, Terraform
• [x] AKS Node Pool, Terraform
• [x] Create a stack, that deploys the components; testing

[oginskis]

Resolved in 378d7997d88575e91df10b81ef900aa96f511a9c