grafana: disable grafana0 backups
grafana: disable grafana0 backups

puppetized server with no local data

Related to T3817

SoftwareHeritage/puppet-swh-site,SoftwareHeritage/puppet-swh-site,SoftwareHeritage/puppet-swh-site,SoftwareHeritage/puppet-swh-site,SoftwareHeritage/puppet-swh-site