Enable aot on net8

Author: Arlodotexe

MultiTarget/DefinedConstants.props

@@ -15,6 +15,10 @@
         <DefineConstants Condition="'$(IsWpf)' == 'true'">$(DefineConstants);HAS_UNO_SKIA;__SKIA__;WINDOWS_WPF;</DefineConstants>
         <DefineConstants Condition="'$(IsGtk)' == 'true'">$(DefineConstants);HAS_UNO_SKIA;__SKIA__;__GTK__;</DefineConstants>
 
+        <DefineConstants Condition="$([MSBuild]::IsTargetFrameworkCompatible('$(TargetFramework)', 'net8.0'))">$(DefineConstants);NET8_0_OR_GREATER</DefineConstants>
+        <DefineConstants Condition="$([MSBuild]::IsTargetFrameworkCompatible('$(TargetFramework)', 'net7.0'))">$(DefineConstants);NET7_0_OR_GREATER</DefineConstants>
+        <DefineConstants Condition="$([MSBuild]::IsTargetFrameworkCompatible('$(TargetFramework)', 'net6.0'))">$(DefineConstants);NET6_0_OR_GREATER</DefineConstants>
+
         <DefineConstants Condition="$(IsAllExperimentHead) == 'true'">$(DefineConstants);ALL_SAMPLES</DefineConstants>
     </PropertyGroup>
 </Project>