[aws-eks-iam] aws-iam-.. modules refactoring

[mglotov]

Current Behavior

There are a lot of terraform modules to create aws-iam roles used for eks workloads.

terraform/modules/aws-iam-autoscaler                                 
terraform/modules/aws-iam-roles
terraform/modules/aws-iam-aws-loadbalancer-controller 
terraform/modules/aws-iam-external-dns                
terraform/modules/aws-iam-s3
terraform/modules/aws-iam-ci                          
terraform/modules/aws-iam-grafana                     
terraform/modules/aws-iam-ssm

They differ only in an iam policy. Also, this breaks the concept of using Terraform modules (Terraform module is a reusable piece of code).

Expected Behavior

It'd be better to have one aws-iam module aws-iam-eks-trusted and set policy as an input.