Correlations: Hide Correlations Page behind a feature toggle (#55224)

* Hide Correlations Page behind a toggle

* Remove redundant defaults

* Ensure top nav is rendered when correlations are disabled

This is for the case when:

[feature_toggles]
topnav = true

pkg/api/index.go

@@ -356,7 +356,7 @@ func (hs *HTTPServer) setupConfigNodes(c *models.ReqContext) ([]*dtos.NavLink, e
 		})
 	}
 
-	if hasAccess(ac.ReqOrgAdmin, correlations.ConfigurationPageAccess) {
+	if hs.Features.IsEnabled(featuremgmt.FlagCorrelations) && hasAccess(ac.ReqOrgAdmin, correlations.ConfigurationPageAccess) {
 		configNodes = append(configNodes, &dtos.NavLink{
 			Text:        "Correlations",
 			Icon:        "gf-glue",

pkg/services/featuremgmt/registry.go

@@ -172,6 +172,11 @@ var (
 			Description: "Enable command palette",
 			State:       FeatureStateAlpha,
 		},
+		{
+			Name:        "correlations",
+			Description: "Correlations page",
+			State:       FeatureStateAlpha,
+		},
 		{
 			Name:        "cloudWatchDynamicLabels",
 			Description: "Use dynamic labels instead of alias patterns in CloudWatch datasource",

pkg/services/featuremgmt/toggles_gen.go

@@ -127,6 +127,10 @@ const (
 	// Enable command palette
 	FlagCommandPalette = "commandPalette"
 
+	// FlagCorrelations
+	// Correlations page
+	FlagCorrelations = "correlations"
+
 	// FlagCloudWatchDynamicLabels
 	// Use dynamic labels instead of alias patterns in CloudWatch datasource
 	FlagCloudWatchDynamicLabels = "cloudWatchDynamicLabels"