Add additional fields for integration dashboards

[estolfo]

What does this PR do?

This PR adds some more metrics exported via OTLP that are necessary to build dashboards as part of the associated integration.

Why is it important/What is the impact to the user?

Checklist

• My code follows the style guidelines of this project
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have made corresponding change to the default configuration files (and/or docker env variables)
• I have added tests that prove my fix is effective or that my feature works

Author's Checklist

• [ ]

How to test this PR locally

Related issues

• Related to Build integration for Logstash metrics via OTLP #19022

Use cases

Screenshots

Logs

[github-actions]

🤖 GitHub comments

Just comment with:

• run docs-build : Re-trigger the docs validation. (use unformatted text in the comment!)
• run exhaustive tests : Run the exhaustive tests Buildkite pipeline.

[mergify]

This pull request does not have a backport label. Could you fix it @estolfo? 🙏
To fixup this pull request, you need to add the backport labels for the needed
branches, such as:

• backport-8./d is the label to automatically backport to the 8./d branch. /d is the digit.
• If no backport is necessary, please add the backport-skip label

[elasticmachine]

💚 Build Succeeded

• Buildkite Build
• Commit: eb23906

History

• 💛 Build #4917 was flaky 46fb4c6
• 💔 Build #4881 failed ef60b78