#2989 added the capability to attach metadata to workspace resources and have it displayed in the UI. Demonstrate this functionality by adding metadata to one or more example templates.

This might involve a new template that exists specifically to show off the metadata feature, but we could also just add useful metadata to some of our existing templates (e.g. IDs of cloud resources such as instances, pods and volumes).

Definition of Done

We should have at least one workspace template that is usable in its own right and includes metadata. It does not need to comprehensively demonstrate every possible feature (e.g. marking metadata items as "sensitive") if there's no good reason to do so.