Remove the processes plugin from the default list of plugins per comment on https://bugzilla.redhat.com/show_bug.cgi?id=2074853#c3
Moving to VERIFIED as the release note is the last item required to complete this task.
Updated doc: https://access.redhat.com/documentation/en-us/red_hat_openstack_platform/17.0/html-single/operational_measurements/index#con-collectd-measurements_planning-for-operational-measurements