This is the backend issue to provide the data needed by the frontend in order to show the new "Last updated" box in the project security dashboard.  Required data: * Pipeline number * How long ago the pipeline above ran ## Implementation Plan - [ ] ~backend Update `project_security_dashboard_config` method in `ee/app/helpers/ee/projects_helper.rb` to include latest successful pipeline with security reports data. - [ ] ~backend Update `ee/spec/helpers/projects_helper_spec.rb` to reflect new behavior.