Create a Troubleshooting steps section in the README

[ashseqera]

Noticed while testing the module that if your local kube config is messed up then you might face the following error while trying to access the newly created cluster ,

│ Error: The configmap "aws-auth" does not exist
│ 
│   with module.terraform-seqera-aws.module.eks.kubernetes_config_map_v1_data.aws_auth[0],
│   on .terraform/modules/terraform-seqera-aws.eks/main.tf line 562, in resource "kubernetes_config_map_v1_data" "aws_auth":
│  562: resource "kubernetes_config_map_v1_data" "aws_auth" {
│ 
╵
╷
│ Error: Unauthorized
│ 
│   with module.terraform-seqera-aws.kubernetes_namespace_v1.this[0],
│   on .terraform/modules/terraform-seqera-aws/main.tf line 205, in resource "kubernetes_namespace_v1" "this":
│  205: resource "kubernetes_namespace_v1" "this" {
│ 

Solution: Clear out ~/.kube/config and try again. Remember to take a back up of the file before removing it .