Proposed title of this feature request

Enable the processes_linux collector in node_exporter

What is the nature and description of the request?

Enable node_exporter's processes_linux collector to allow customer to monitor the number of PIDs on OCP nodes.

Why does the customer need this? (List the business requirements)

They need to be able to monitor the number of PIDs on the OCP nodes.

List any affected packages or components.

cluster-monitoring-operator, node-exporter