Add additional guidance and considerations around utilizing EKS Auto Mode

[ricmattj]

Describe the best practice
A new EKS Auto Mode section specific to auto-scaling has been added to the best practices guide. However, there are other considerations and best practices around Auto Mode that are worthwhile to communicate. For instance: When add managed node groups to an Auto Mode cluster the user must also deploy the add ons for VPC CNI, Core DNS, and Kube Proxy. It probably makes sense to have a top level Auto Mode page with recommendations like this that can link off to pages like the autoscaling overview.

[avinashdesireddy]

+1 to have a top level Auto Mode page with links to recommendations to the respective pages.

For the following - Should this go into the Deployment options in the install/setup section of the documentation? On these lines we can focus more on best practices to migrate workload or running workload with the combination of managed node groups and automode

For instance: When add managed node groups to an Auto Mode cluster the user must also deploy the add ons for VPC CNI, Core DNS, and Kube Proxy.