Add Grafana panels with workspace traces metrics

[mkuznyetsov]

What does this PR do?

Add several panels to Grafana to observe Workspace API traces:

What issues does this PR fix or reference?

#13502

Release Notes

Docs PR

[che-bot]

E2E Happy path tests of Eclipse Che Single User on K8S (minikube v1.1.1) has been successful:

• build details
• "che-server" docker image: maxura/che-server:14500

[che-bot]

E2E tests of Eclipse Che Multiuser on OCP has been successful:

• Build details
• Test report
• docker image: eclipseche/che-server:14500

[skabashnyuk]

@mkuznyetsov I would like to ask you for a couple of adjustments.

• minimum values on panels. For the timers, it makes sense to set it to 0
• add units of measurements
• for all workspace start/stop related measurements in case of aggregation function (like rate) please use time window [1h]
• On a new panel please use Null as zeoro configuration parameter

[metlos]

Do we plan to also add these to the helm chart?

If yes, then some of the charts need to be modified, because they're openshift specific (which makes sense in the openshift template ;) ).

Otherwise LGTM.

[skabashnyuk]

Do we plan to also add these to the helm chart?

Not as a part of this issue/pr.

[che-bot]

E2E Happy path tests of Eclipse Che Single User on K8S (minikube v1.1.1) has been successful:

• build details
• "che-server" docker image: maxura/che-server:14500

[che-bot]

E2E Happy path tests of Eclipse Che Single User on K8S (minikube v1.1.1) has been successful:

• build details
• "che-server" docker image: maxura/che-server:14500

[che-bot]

E2E tests of Eclipse Che Multiuser on OCP has failed:

• Build details
• Test report
• docker image: eclipseche/che-server:14500
  https://github.com/orgs/eclipse/teams/eclipse-che-qa please check this report.
  Use command "ci-test" to rerun the test.

[che-bot]

E2E Happy path tests of Eclipse Che Single User on K8S (minikube v1.1.1) has been successful:

• build details
• "che-server" docker image: maxura/che-server:14500

[che-bot]

E2E tests of Eclipse Che Multiuser on OCP has failed:

• Build details
• Test report
• docker image: eclipseche/che-server:14500
  https://github.com/orgs/eclipse/teams/eclipse-che-qa please check this report.
  Use command "ci-test" to rerun the test.

[mkuznyetsov]

ci-test

[che-bot]

E2E tests of Eclipse Che Multiuser on OCP has been successful:

• Build details
• Test report
• docker image: eclipseche/che-server:14500