Add test for template bindings compilation

src/Controls/tests/Xaml.UnitTests/TemplateBindingsCompiler.xaml

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+<?xml version="1.0" encoding="UTF-8"?>
+<ContentPage
+		xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
+		xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+		xmlns:local="clr-namespace:Microsoft.Maui.Controls.Xaml.UnitTests"
+		x:Class="Microsoft.Maui.Controls.Xaml.UnitTests.TemplateBindingsCompiler" >
+	<ContentPage.Resources>
+		<ControlTemplate x:Key="MyCardTemplate">
+			<Label
+				x:Name="CardTitleLabel"
+				Text="{TemplateBinding CardTitle, x:DataType=local:TemplateBindingCompilerTestCardView}" />
+		</ControlTemplate>
+	</ContentPage.Resources>
+
+	<local:TemplateBindingCompilerTestCardView
+		x:Name="ContentView"
+		CardTitle="The title"
+		ControlTemplate="{StaticResource MyCardTemplate}" />
+</ContentPage>

src/Controls/tests/Xaml.UnitTests/TemplateBindingsCompiler.xaml.cs

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+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Diagnostics;
+using System.Runtime.CompilerServices;
+using Microsoft.Maui.Controls;
+using Microsoft.Maui.Controls.Core.UnitTests;
+using Microsoft.Maui.Controls.Internals;
+using Microsoft.Maui.Dispatching;
+using Microsoft.Maui.UnitTests;
+using NUnit.Framework;
+
+namespace Microsoft.Maui.Controls.Xaml.UnitTests
+{
+	public partial class TemplateBindingsCompiler : ContentPage
+	{
+		public TemplateBindingsCompiler()
+		{
+			InitializeComponent();
+		}
+
+		public TemplateBindingsCompiler(bool useCompiledXaml)
+		{
+			//this stub will be replaced at compile time
+		}
+
+		[TestFixture]
+		public class Tests
+		{
+			[SetUp] public void Setup() => DispatcherProvider.SetCurrent(new DispatcherProviderStub());
+			[TearDown] public void TearDown() => DispatcherProvider.SetCurrent(null);
+
+			[TestCase(false)]
+			[TestCase(true)]
+			public void Test(bool useCompiledXaml)
+			{
+				var page = new TemplateBindingsCompiler(useCompiledXaml);
+				var label = (Label)page.ContentView.GetTemplateChild("CardTitleLabel");
+				Assert.AreEqual("The title", label?.Text);
+
+				if (useCompiledXaml)
+				{
+					var binding = label.GetContext(Label.TextProperty).Bindings.GetValue();
+					Assert.That(binding, Is.TypeOf<TypedBinding<TemplateBindingCompilerTestCardView, string>>());
+				}
+			}
+		}
+	}
+
+	public class TemplateBindingCompilerTestCardView : ContentView
+	{
+		public static readonly BindableProperty CardTitleProperty =
+			BindableProperty.Create(nameof(CardTitle), typeof(string), typeof(TemplateBindingCompilerTestCardView), string.Empty);
+
+		public string CardTitle
+		{
+			get => (string)GetValue(CardTitleProperty);
+			set => SetValue(CardTitleProperty, value);
+		}
+	}
+}