Canvas: Add gdev dashboard for connections (#67792)

devenv/jsonnet/dev-dashboards.libsonnet

@@ -135,6 +135,13 @@ local dashboard = grafana.dashboard;
         id: 0,
       }
     },
+    dashboard.new('canvas-connection-examples', import '../dev-dashboards/panel-canvas/canvas-connection-examples.json') +
+    resource.addMetadata('folder', 'dev-dashboards') +
+    {
+      spec+: {
+        id: 0,
+      }
+    },
     dashboard.new('canvas-examples', import '../dev-dashboards/panel-canvas/canvas-examples.json') +
     resource.addMetadata('folder', 'dev-dashboards') +
     {