Add name, author and sha to releases

What does this MR do?

This commit adds a name to each release, defaulting it to tag name, keeps track of the SHA when a new release is created and tracks the current user as release author.

It's only a ~backstage improvement for gitlab-org/gitlab-ce#41766

What are the relevant issue numbers?

• gitlab-org/gitlab-ce#41766

Does this MR meet the acceptance criteria?

• Changelog entry added, if necessary
• Documentation created/updated
• Tests added for this feature/bug
• Conforms to the code review guidelines
• Conforms to the merge request performance guidelines
• Conforms to the style guides
• Conforms to the database guides
• Link to e2e tests MR added if this MR has Requires e2e tests label. See the Test Planning Process.
• Security reports checked/validated by reviewer