elk: upgrade journalbeat and filebeat

- Remove the journalbeat 5.5.0 service configuration
- remove the journalbeat user not needed anymore
- deploy the elasticsearch packages (journalbeat and filebeat)
- cleanup the temporary configuration
- cleanup the old cursor position, when the version will be updated
  the beginning of the journal will be reingested
- update the logstash configuration to support the messages
  from the old journalbeat version and the new version in parallel
- allow to override the beat version for node with an elasticsearch
  version specified (swh-search)
- upate the `check_journal` script to use the new registry file
  to check the cursor position
- Automatically declare the index template from the logstash host

Related to T3705