[Fleet] Add agent privileges telemetry

[nchaulet]

Summary

Resolve https://github.com/elastic/ingest-dev/issues/2267

Add telemetry for agent privileges for this send a new event in fleet agent events with the following schema

agents_per_privileges: {
  root:  0,
  unprivileged: 0
}

TODO

• PR in telemetry to add the new mappings
• Update tests

[apmmachine]

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[nchaulet]

/ci

[nchaulet]

/ci

[elasticmachine]

Pinging @elastic/fleet (Team:Fleet)

[kpollich]

LGTM - thanks for updating the integration tests here.

[kibana-ci]

💚 Build Succeeded

• Buildkite Build
• Commit: 3b66da3

Metrics [docs]

✅ unchanged

History

• 💚 Build #210604 succeeded 8850286

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@elasticmachine merge upstream

cc @nchaulet