Convert epic to issue
- In https://gitlab.com/gitlab-org/gitlab-ee/issues/3777, we want to promote an issue to an epic.
- In this issue, we want to do the opposite, i.e. take an epic, close it, and copy over the information into an issue.
- Similar to the promotion case, this addresses the problem when you’ve created some scoped work or started a discussion in one type object, but later on decide it belongs to another type of object.