terraform tests: Reenable upgrade test

Seen in https://buildkite.com/materialize/nightly/builds/13722#0199d59c-79cc-4137-b55f-7072fa58169a

Author: def-

ci/nightly/pipeline.template.yml

@@ -1419,7 +1419,6 @@ steps:
             args: [--no-cleanup]
             ci-builder: stable
       branches: "main v*.* *aws* *tf* *terraform* *helm* *self-managed* *orchestratord*"
-      skip: "https://github.com/MaterializeInc/terraform-aws-materialize/issues/71"
 
     - id: terraform-gcp
       label: "Terraform + Helm Chart E2E on GCP"

test/terraform/aws-persistent/main.tf

@@ -38,7 +38,6 @@ module "materialize_infrastructure" {
   operator_version             = var.operator_version
   orchestratord_version        = var.orchestratord_version
 
-  # TODO: This currently fails: https://github.com/MaterializeInc/terraform-aws-materialize/issues/71
   helm_values = {
     operator = {
       args = {