[obs] Dashboard for psi metrics

Author: Furisto

operations/observability/mixins/workspace/dashboards.libsonnet

@@ -22,5 +22,6 @@
     'gitpod-node-problem-detector.json': (import 'dashboards/node-problem-detector.json'),
     'gitpod-network-limiting.json': (import 'dashboards/network-limiting.json'),
     'gitpod-component-image-builder.json': (import 'dashboards/components/image-builder.json'),
+    'gitpod-psi.json': (import 'dashboards/psi.json'),
   },
 }