aws: Add metrics UX demo
aws: Add metrics UX demo

Set up a few resource hogging services/containers for users to find and
identify.

Some parts should be started about 20 to 30 minutes before the test
begins, create an `~admin/demo-prep.sh` script for that. The test
conductor needs to run this manually.

cockpit-project/cockpituous,cockpit-project/cockpituous