Node.js default metrics dashboards

[estolfo]

Let's make sure metrics dashboards are shown for the OTel distro in the Metrics tab and that the metrics shown are meaningful. This task might also require some UI task coordination and portable dashboard work.
If work was done for this issue, it's possible some of it could be reused.

[david-luna]

As for now Kibana does no differentiate between native SDK or our distro. This PR landed in 8.13 to display memory metrics for OTEL agents and was used in the EAH to show the memory metrics exported by our distro.

About portable dashboards there is this contrib PR. It stays open since I didn't test with other agents, my bad. I could ping someone from Java or another language to do try it out.

[david-luna]

As agreed in today's APM agents meeting (2024-05-14) the metrics tab should contain only runtime related metrics, in our case node metrics. There is already a PR to add these into semantic conventions open-telemetry/semantic-conventions#990

We should wait for these metrics to land then check on https://www.npmjs.com/package/@opentelemetry/instrumentation-runtime-node and do the proper updates into the upstream repo

[david-luna]

Kibana PR created elastic/kibana#199353

Next steps

• add @opentelemetry/instrumentation-runtime-metrics in EDOT for Node.js once published (ref)
• release a new version of EDOT for Node.js

[david-luna]

Dashboard also backported to 8.x (kudos to @trentm)
elastic/kibana#200810