Merge pull request #11932 from unoplatform/dev/mazi/wrapgrid-throw

docs: Make it clearer that `VirtualizingPanelLayout` is not supported

src/Uno.UI/UI/Xaml/Controls/Primitives/OrientedVirtualizingPanel.cs

-#pragma warning disable 108 // new keyword hiding
-namespace Windows.UI.Xaml.Controls.Primitives
+using System;
+
+namespace Windows.UI.Xaml.Controls.Primitives;
+
+[global::Uno.NotImplemented]
+public partial class OrientedVirtualizingPanel
 {
-	[global::Uno.NotImplemented]
-	public partial class OrientedVirtualizingPanel
+	public OrientedVirtualizingPanel()
 	{
-		public OrientedVirtualizingPanel()
-		{
+	}
 
-		}
+	private protected override VirtualizingPanelLayout GetLayouterCore()
+	{
+		throw new NotSupportedException(
+			$"{GetType().Name} is not supported in Uno Platform yet. " +
+			"Use a non-virtualized panel (e.g. ItemsStackPanel) instead.");
 	}
 }