[FEATURE] Confirm all modules are available to run in AWS-CN partition

Remove all hardcoded references to the `:aws:` partition.

Typically they would be referenced in the modulestack.yaml and stack.py (if python based). No need to modify unittests.

Some examples of modules that need to be refacotred:
- modules/eks/ray-on-eks
- modules/examples/airflow-dags
- modules/sagemaker/sagemaker-model-cicd (??? - Not sure about this)
- modules/sagemaker/sagemaker-service-templates-service-catalog