downloads API to include release status on the released version

e.g: https://downloads.mariadb.org/rest-api/mariadb/11.1.2 should have a release_status.

Its the release that contains a release status rather than the major version.

The current available https://downloads.mariadb.org/rest-api/mariadb containing inaccurate information on release day is causing frequent delays to Docker Official Images or incorrect releases (https://github.com/MariaDB/mariadb-docker/issues/529).