Ensure that all automatic relation types are updated (#13470)

src/Umbraco.Core/Constants-Conventions.cs

@@ -344,7 +344,6 @@ public static partial class Constants
             ///     Developers should not manually use these relation types since they will all be cleared whenever an entity
             ///     (content, media or member) is saved since they are auto-populated based on property values.
             /// </remarks>
-            [Obsolete("This is no longer used, and will be removed in v12")]
             public static string[] AutomaticRelationTypes { get; } = { RelatedMediaAlias, RelatedDocumentAlias };
 
             // TODO: return a list of built in types so we can use that to prevent deletion in the UI

src/Umbraco.Core/PropertyEditors/IDataValueReference.cs

@@ -14,4 +14,10 @@ public interface IDataValueReference
     /// <param name="value"></param>
     /// <returns></returns>
     IEnumerable<UmbracoEntityReference> GetReferences(object? value);
+
+    /// <summary>
+    ///     Returns all reference types that are automatically tracked.
+    /// </summary>
+    /// <returns></returns>
+    IEnumerable<string> GetAutomaticRelationTypesAliases() => Enumerable.Empty<string>();
 }