Fixing issue #13865 (i.e. Rich text link picker not resolving correct variant when using .ValueFor()). (#13889)

src/Umbraco.Core/Models/PublishedContent/IPublishedValueFallback.cs

@@ -5,6 +5,11 @@ namespace Umbraco.Cms.Core.Models.PublishedContent;
 /// </summary>
 public interface IPublishedValueFallback
 {
+    /// <summary>
+    /// VariationContextAccessor that is not required to be implemented, therefore throws NotImplementedException as default.
+    /// </summary>
+    IVariationContextAccessor VariationContextAccessor { get { throw new NotImplementedException(); } set { throw new NotImplementedException(); } }
+
     /// <summary>
     ///     Tries to get a fallback value for a property.
     /// </summary>

src/Umbraco.Core/Models/PublishedContent/PublishedValueFallback.cs

@@ -20,6 +20,8 @@ public class PublishedValueFallback : IPublishedValueFallback
         _variationContextAccessor = variationContextAccessor;
     }
 
+    public IVariationContextAccessor VariationContextAccessor { get { return _variationContextAccessor; } }
+
     /// <inheritdoc />
     public bool TryGetValue(IPublishedProperty property, string? culture, string? segment, Fallback fallback, object? defaultValue, out object? value) =>
         TryGetValue<object>(property, culture, segment, fallback, defaultValue, out value);