This adds the ability to pre-generate values and tag sets in the data generator. This makes it easy to have tags that depend on other tag values (like buckets in an org) and have tag values that have one associated tag (like if something is in production or staging environment). Follow on work will add the actual generation to the agent spec. An added bonus of these pre-generated values is that generating samples won't require any sort of template evaluation for all of the tags in the tag sets. Only unique values (like trace_id or span_id) would need to be generated during sampling generation.
Paul Dix