Disable ExtendedLayout tests when using Mono AOT (#120530)

* Disable ExtendedLayout tests when using Mono AOT

* Fix tracking issue reference in ExtendedLayout.csproj

Author: kotlarmilos

src/tests/Loader/classloader/ExtendedLayout/ExtendedLayout.csproj

@@ -1,6 +1,10 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
+
+    <!-- Tracking issue: https://github.com/dotnet/runtime/issues/119948 -->
+    <MonoAotIncompatible>true</MonoAotIncompatible>
+    <DisableProjectBuild Condition="'$(RuntimeFlavor)' == 'mono'">true</DisableProjectBuild>
   </PropertyGroup>
   <ItemGroup>
     <Compile Include="ExtendedLayout.cs" />