Python preview generation puts Preview clients in the top-level ./preview-packages/ directory with an identical name as its stable counterpart. Go preview generation puts Preview clients in ./preview/internal directory with an identical name as its stable coutnerpart.

We'd like to be able to release a preview client, as identified by suffixed name e.g. {package}-preview. We may need a state.yaml entry with this Preview suffixed ID.

This will require changes in legacylibrarian release stage and potentially in publish.