Implement the jounal client counting an internal property of an object
and use it to count the persons inside the releases and revisions.
Via an new argument 'keys'/'messages' supported by the cli, different journal client implemtations and worker functions are used. 'keys' is the old behavior counting only the different message keys of a given topic.
Related to swh-web#3251 (closed)
Somme adaptations on the puppet code will be necessary to be able to deploy this diff
Test Plan
- tox
- containers
Migrated from D5572 (view on Phabricator)