[Metricbeat][Kibana][stats] Stop collecting usage

[afharo]

Describe the enhancement:

As part of the efforts for decoupling Monitoring & Telemetry in Kibana (elastic/kibana#83626), we are stopping the collection of usage data (elastic/kibana#83521), meaning we'll only collect metric-related stats from 7.11 and future versions.

This can be achieved by always sending exclude_usage=true when requesting the API /api/stats?extended=true&legacy=true&exclude_usage=true (line where we control it).

Describe a specific use case for the enhancement or feature:

Currently, the stats dataset in the Metricbeat-Kibana module collects the extended usage details every 24h so the Monitoring plugin store it in the .monitoring-kibana-* indices. These usage details are not actually used by the Monitoring plugin itself to anything other than reporting telemetry.

With the rise of the local telemetry, monitoring-sourced telemetry doesn't need to report this data anymore, so we can disable the collection in the 2 sources of information for the Monitoring plugin:

• Legacy Kibana-driven collection ([Monitoring] Stop collecting Kibana Usage in bulkUploader kibana#83546)
• Metricbeat collection (this issue).

[elasticmachine]

Pinging @elastic/integrations-services (Team:Services)

[elasticmachine]

Pinging @elastic/stack-monitoring (Stack monitoring)