Aws eks setup (#13858)

* adding Amazon EKS with Istio setup to platform-setup page

* adding Amazon EKS with Istio setup to platform-setup page

* updating the test section of the doc

* adding period at the end of description for the error in test

* adding newline at end of file

* changing the weight to make it ordered alphabetically.

* updating the link as it was  broken due to this change made to folder structure in upstream aws-ia/terraform-aws-eks-blueprints#1754

content/en/docs/setup/platform-setup/amazon-eks/index.md

@@ -8,4 +8,4 @@ owner: istio/wg-environments-maintainers
 test: n/a
 ---
 
-Follow [EKS Blueprints for Istio](https://github.com/aws-ia/terraform-aws-eks-blueprints/tree/main/examples/istio) instructions to provision EKS cluster with Istio setup in AWS cloud.
+Follow [EKS Blueprints for Istio](https://github.com/aws-ia/terraform-aws-eks-blueprints/tree/main/patterns/istio) instructions to provision EKS cluster with Istio setup in AWS cloud.