Pipeline runs are retrieve pipeline per pipeline by the console instead of being retrieved all at once

Going in the "Pipelines" section of the OpenShift console can be very slow if there are many pipelines to iterate on.

4.10.15 (but this problem probably exists on older versions of OpenShift as well)

Always reproducible 

1. Create lots or at least several pipelines.
2. Create few pipeline runs per pipeline
3. With Google Chrome, start the developer tools and go in the "Pipelines/Pipelines" section available in the left menu.

You will see one request to get all pipeline.
Then for each pipeline, you will have one request per pipeline to retrieve its runs.

We should have one request to retrieve all pipeline runs at once in order to scale with the number of pipelines.
Of course the request would only retrieve the first runs if there are many and let the user scroll on the next pages if needed (i.e. continuation)
This is what is done for other kind of objects such as routes.

Ticket opened by the customer on that:
https://issues.redhat.com/browse/OHSS-16028