[Telemetry] Report the Application Usage (time of usage + number of clicks)

[afharo]

Summary

Add a plugin that retrieves the time (in minutes) and the number of clicks on each application inside Kibana and report it via telemetry.

It uses its own index to store the grouped events in the form of { timestamp, appId, numberOfClicks, minutesOfScreenTime }. Rolling up the information to saved objects for the entries older than 90 days (because the required reported data has 3 levels of aggregation: 30 days, 90 days and total).

The finally reported information to our telemetry service looks like below:

    "stack_stats": {
      "kibana": {
        "plugins": {
           ...
           "application_usage": {
             "logs": {
                 "clicks_total": 1000,
                 "clicks_30_days": 10,
                 "clicks_90_days": 100,
                 "minutes_on_screen_total": 58.93,
                 "minutes_on_screen_30_days": 10.23,
                 "minutes_on_screen_90_days": 30.0,
             },
             "apm": { ...},
             ...
           }
           ...
       }
  }

Fixes #52737

Checklist

Delete any items that are not applicable to this PR.

• Unit or functional tests were updated or added to match the most common scenarios
• This was checked for cross-browser compatibility, including a check against IE11

For maintainers

• This was checked for breaking API changes and was labeled appropriately

[elasticmachine]

Pinging @elastic/pulse (Team:Pulse)

[afharo]

I'm pending some unit tests and I'll release it from the draft status

[afharo]

@elasticmachine merge upstream

[kibanamachine]

💚 Build Succeeded

• continuous-integration/kibana-ci/pull-request
• Commit: 9fd1324

History

• 💚 Build #28111 succeeded ec22dad
• 💚 Build #28096 succeeded 9226712
• 💔 Build #28079 failed 39c6730
• 💔 Build #27998 failed 5e81450
• 💔 Build #27883 failed 665dd4e

To update your PR or re-run it, just comment with:
@elasticmachine merge upstream

[afharo]

After speaking with @Bamieh, we agreed it's better to make use of the UI-Metrics reporter. So I'll be migrating some of this logic there and will push an update.

[afharo]

Closing in favour of #58401

[elasticmachine]

Pinging @elastic/kibana-core (Team:Core)