Deploy swh-counters:v0.1.0 in staging

Prepare the terraform and puppet configurations to allow the deployment of the counters in staging. It will create the bases for the production deployment.

It implies to create a new vm with redis that will also run the gunicorn service and the journal client.

(The prometheus endpoint is not yet implemented on swh-counter, it will be in a second step)

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Migrated from T3159 (view on Phabricator)