In addition to workflows for all of Go release types, relui holds a few workflows for miscellaneous recurring tasks that come up in the release cycle (go.dev/s/release) such as pinging early-in-cycle issues and removing wait-release hashtags after tree reopening.

This is a tracking issue for relui workflows for a few more recurring tasks that are a good fit for automation, such as:

• applying wait-release hashtags to CLs where it can be determined to apply
• promoting api/next to api/go1.n.txt and filing an API audit issue
• merging release note fragments with relnote generate (newly applicable after doc: improve release notes  #64169), atomically moving the result to x/website

CC @golang/release.