(PE-34279) tag-release: push tag before snapshot for release
(PE-34279) tag-release: push tag before snapshot for release

Push the release commit and the tag before pushing the final commit
introducing the new snapshot version so that anything watching the
branch will see the events in branch order.

Previously, for example, jenkins (triggered via the webhook) never ran
the jobs for the release.

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