Canvas: add feature flag for nesting elements (#49958)

pkg/services/featuremgmt/registry.go

@@ -248,5 +248,11 @@ var (
 			Description: "Enable wide series responses in the Prometheus datasource",
 			State:       FeatureStateAlpha,
 		},
+		{
+			Name:         "canvasPanelNesting",
+			Description:  "Allow elements nesting",
+			State:        FeatureStateAlpha,
+			FrontendOnly: true,
+		},
 	}
 )

pkg/services/featuremgmt/toggles_gen.go

@@ -182,4 +182,8 @@ const (
 	// FlagPrometheusWideSeries
 	// Enable wide series responses in the Prometheus datasource
 	FlagPrometheusWideSeries = "prometheusWideSeries"
+
+	// FlagCanvasPanelNesting
+	// Allow elements nesting
+	FlagCanvasPanelNesting = "canvasPanelNesting"
 )