removed old terraform k8s examples and refered to current repo

...r-terraform/example-templates/cluster-options-example.yml

...er-terraform/example-templates/node-template-example.json

terraform/rancher-terraform/main.tf

terraform/rke-terraform/main.tf

terraform/rke-terraform/user-data.sh

terraform/rke2-terraform/README.md

terraform/rke2-terraform/main.tf

terraform/rke2-terraform/outputs.tf

terraform/rke2-terraform/variables.tf