Make 2 serverless dashboards available in the DevExp->Observe Dashboard

Description

As a user, I should be able to see below knative dashboard on the dev perspective

• Knative Serving - Revision CPU and Memory Usage (actual code)
• Knative Serving - Queue Proxy (actual code)

Acceptance Criteria

1. the dashboard should appear on dev perspective observe tab

Additional Details:

• Add the dashboard name https://github.com/openshift/cluster-monitoring-operator/blob/master/jsonnet/components/grafana.libsonnet and they should show up on the dev perspective
• The second one requires User Workload Monitoring to be installed along with the right service monitors in the app ns (more in the link|).