Follow-up from "Rename CreateEmptyEmbeddingsRecordsWorker"

The following discussion from !144374 (merged) should be addressed:

• @mallocke started a discussion: (+2 comments)

  question for maintainer Looking at some other MRs I see a couple of options:

  • This MR renames a worker, creating a new queue but leaving the old one in place. Presumably the old queue will be removed at the same time as the old worker.
  • Alternatively, this MR runs a post_migrate to rename the existing queue.

  Given the queue in this MR is for a cron job which runs once a day I think for simplicity sake we can keep the old queue around until clean up in the next milestone, i.e. don't add a post_migrate to rename the queue here. But I'd appreciate a second opinion.