[EKS] [Node upgrade strategy]: Blue/Green deployment

We are looking for blue/green 0 impact node upgrade. We do this today in our CICD pipeline, but it would be great to have this strategy in place for managed nodes. They way it works is similar to what is prescribed here. This is a best practice in order to provide seamless migration. This decouples infrastructure/node deployment from pod eviction.

https://docs.aws.amazon.com/eks/latest/userguide/migrate-stack.html