Grafazos, Releases: Link Dashboards assets in the gitlab release page

What

Depends on !17545 (merged)

This Merge request adapts the grafazos/scripts/releases/create_gitlab_release.sh so that it includes a link to a gitlab package that contains the generated dashboards.

Why

How

The publsh:release job now depends on the artefacts of the dashboard build job.

These artefacts are then uploaded in the giltab package registry grafazos-x.y.

A link to that registry is added to the release page via release-cli.

Manually testing the MR

Check https://gitlab.com/nomadic-labs/tezos/-/releases/grafazos-v1111.15, especially the Dashboard link.

Checklist

• Document the interface of any function added or modified (see the coding guidelines)
• Document any change to the user interface, including configuration parameters (see node configuration)
• Provide automatic testing (see the testing guide).
• For new features and bug fixes, add an item in the appropriate changelog (docs/protocols/alpha.rst for the protocol and the environment, CHANGES.rst at the root of the repository for everything else).
• Select suitable reviewers using the Reviewers field below.
• Select as Assignee the next person who should take action on that MR