Deploy maven stack in production

Plan:

• Deploy maven indexer exporter services (one per maven indexes: maven-central, ...)
• Deploy frontend to expose maven indexer exporter results (*.fld files)
• Deploy maven worker services: lister + loader
• scheduler (saatchi): Restart swh-scheduler-schedule-recurrent service (so maven tasks are scheduled)
• Add maven central so maven exporter scrapes its index and export it
• Discover it failed (out of disk space) due to a forgotten step ¯_(ツ)_/¯
• #3746 (closed): Prepare maven-exporter node to have enough disk to receive indices
• Restart maven export for maven-central
• #4330 (closed): Wait for the end of it ^...
• #4330 (closed): Add maven central to the standard listing once ^ is done
• infra/puppet/puppet-swh-site!554: Make sure lister workers consume the maven queues
• #4330 (closed): Checks

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Migrated from T4330 (view on Phabricator)