Use latest Angle builds (#13081)

* Add "EGL_ANGLE_flexible_surface_compatibility" ext check

* Use stackalloc with CreatePBufferFromClientBuffer attributes

* Fix broken API

* Update to latest angle

src/Windows/Avalonia.Win32/Avalonia.Win32.csproj

@@ -8,7 +8,7 @@
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\..\..\packages\Avalonia\Avalonia.csproj" />
-    <PackageReference Include="Avalonia.Angle.Windows.Natives" Version="2.1.0.2023020321" />
+    <PackageReference Include="Avalonia.Angle.Windows.Natives" Version="2.1.22045.20230930" />
     <PackageReference Include="MicroCom.CodeGenerator.MSBuild" Version="0.11.0" PrivateAssets="all" />
     <MicroComIdl Include="WinRT\winrt.idl" CSharpInteropPath="WinRT\WinRT.Generated.cs" />
     <MicroComIdl Include="Win32Com\win32.idl" CSharpInteropPath="Win32Com\Win32.Generated.cs" />

src/tools/Avalonia.Designer.HostApp/Avalonia.Designer.HostApp.csproj

@@ -22,7 +22,7 @@
     <Compile Include="..\..\Avalonia.Base\Utilities\StringBuilderCache.cs" Link="Utilities\StringBuilderCache.cs" />
   </ItemGroup>
   <ItemGroup>
-    <PackageReference Include="Avalonia.Angle.Windows.Natives" Version="2.1.0.2023020321" />
+    <PackageReference Include="Avalonia.Angle.Windows.Natives" Version="2.1.22045.20230930" />
   </ItemGroup>
   <Import Project="..\..\..\build\NetFX.props" />
 </Project>