Adding FGAC annotations validation for creation and deletion (#46736)

Access Control: Adding FGAC annotations validation for creation and deletion
Co-authored-by: IevaVasiljeva <ieva.vasiljeva@grafana.com>

pkg/services/annotations/annotations.go

@@ -149,13 +149,13 @@ type ItemDTO struct {
 type annotationType int
 
 const (
-	Global annotationType = iota
-	Local
+	Organization annotationType = iota
+	Dashboard
 )
 
 func (annotation *ItemDTO) GetType() annotationType {
 	if annotation.DashboardId != 0 {
-		return Local
+		return Dashboard
 	}
-	return Global
+	return Organization
 }