Resolve "Usage ping for artifacts:reports:coverage_report"

What does this MR do and why?

Ref: #339721 (closed)

Customers can upload coverage reports using the artifacts:reports:coverage_report keyword but we do not know how often this is happening.

Add a tracking event that fires when this artifact is uploaded by a pipeline. We should track user who triggered the pipeline and only increment by 1 for each pipeline, not each artifact.

Screenshots or screen recordings

Screenshots are required for UI changes, and strongly recommended for all other merge requests.

How to set up and validate locally

Numbered steps to set up and validate the change are strongly suggested.

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.

Related to #339721 (closed)