Hybrid AWS Environments: allow AWS-Auth configuration for IAM roles
At present, GET does not configure appropriate roles for AWS Auth into the EKS cluster.
As a default, EKS will only allow access to the creating user/role.
Other roles should be configurable.
Documentation at: https://docs.aws.amazon.com/eks/latest/userguide/add-user-role.html
(See also linked MRs for implementation details)