(maint) Fix Docker "name" label
(maint) Fix Docker "name" label

 - Before the Dockerfile was optimized for buildkit, the name varied
   based on whether it was a release build or an edge build from source.

   Change the label to be dynamically set by the type of build.

puppetlabs/puppetdb,puppetlabs/puppetdb,puppetlabs/puppetdb,puppetlabs/puppetdb,puppetlabs/puppetdb