Revert "ci/aws: Remove duplicate info in worker pool name"

This reverts commit 1a4dd25.

In 20b7b69 we reverted the naming of
worker pools so we need this again for CI to behave.

ci/aws/aws-cluster.lokocfg.envsubst

@@ -32,7 +32,8 @@ storage:
         id: 500
 EOF
   ]
-  worker_pool "wp" {
+
+  worker_pool "$CLUSTER_ID-wp" {
     count         = 2
     ssh_pubkeys   = ["$PUB_KEY"]
     disk_size     = 30