SQLStore: Enable migration locking by default (#84983)

* Introduce new configuration for migration locking

* Remove feature toggle

* Fix test and turn it into an integration

* Fix docs

pkg/services/featuremgmt/registry.go

@@ -83,12 +83,6 @@ var (
 			Owner:          grafanaAsCodeSquad,
 			AllowSelfServe: true,
 		},
-		{
-			Name:        "migrationLocking",
-			Description: "Lock database during migrations",
-			Stage:       FeatureStagePublicPreview,
-			Owner:       grafanaBackendPlatformSquad,
-		},
 		{
 			Name:        "storage",
 			Description: "Configurable storage for dashboards, datasources, and resources",

pkg/services/featuremgmt/toggles_gen.csv

@@ -8,7 +8,6 @@ publicDashboardsEmailSharing,preview,@grafana/sharing-squad,false,false,false
 publicDashboardsScene,experimental,@grafana/sharing-squad,false,false,true
 lokiExperimentalStreaming,experimental,@grafana/observability-logs,false,false,false
 featureHighlights,GA,@grafana/grafana-as-code,false,false,false
-migrationLocking,preview,@grafana/backend-platform,false,false,false
 storage,experimental,@grafana/grafana-app-platform-squad,false,false,false
 correlations,GA,@grafana/explore-squad,false,false,false
 exploreContentOutline,GA,@grafana/explore-squad,false,false,true

pkg/services/featuremgmt/toggles_gen.go

@@ -43,10 +43,6 @@ const (
 	// Highlight Grafana Enterprise features
 	FlagFeatureHighlights = "featureHighlights"
 
-	// FlagMigrationLocking
-	// Lock database during migrations
-	FlagMigrationLocking = "migrationLocking"
-
 	// FlagStorage
 	// Configurable storage for dashboards, datasources, and resources
 	FlagStorage = "storage"

pkg/services/featuremgmt/toggles_gen.json

@@ -1428,7 +1428,8 @@
       "metadata": {
         "name": "migrationLocking",
         "resourceVersion": "1709648236447",
-        "creationTimestamp": "2024-03-05T14:17:16Z"
+        "creationTimestamp": "2024-03-05T14:17:16Z",
+        "deletionTimestamp": "2024-03-22T10:42:09Z"
       },
       "spec": {
         "description": "Lock database during migrations",