Automatically determine whether a release is a pre-release in CD

**Is your feature request related to a problem? Please describe.**
Right now, CD prerelease is hard-coded in the cd action

**Describe the solution you'd like**
Have it determine based on the name of the release (if it has a label)

The issue identifies the CD action as the entry point; locate where prerelease status is currently hard-coded and inspect the release metadata available there. Done means the action determines prerelease status from the release name or label instead of a fixed value, then the CD workflow should be exercised to confirm the behavior.

Written by the indexing model from the issue text.