[Feature Request] Workflow metrics should be counting each instance

[rguillome]

Is your feature request related to a problem? Please describe.

I tried the server dashboard example and can't figure what was the Workflow Completion Overview from an business operationnal point of view. I understood that's because of the rate fonction. The dashboard displays Workflow metrics as it would do for HTTP request

Describe the solution you'd like

Removing the rate fonction in the Workflow's Overviews would allow to present as Y coordinates the unique count of workflow executions instead of per-seconds rate which has only a performance visibility purpose.

Additional context

Otherwise, it could keep a performance view (but well named) plus the business operations view.