Allow BinaryFormatter serialization in tests (used by Cloner)

Author: alex-kulakov

Orm/Xtensive.Orm.Tests/Xtensive.Orm.Tests.csproj

@@ -10,6 +10,7 @@
     <AssemblyOriginatorKeyFile>$(OrmKeyFile)</AssemblyOriginatorKeyFile>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     <WarningLevel>2</WarningLevel>
+    <EnableUnsafeBinaryFormatterSerialization Condition="'$(TargetFramework)'=='net8.0'">true</EnableUnsafeBinaryFormatterSerialization>
   </PropertyGroup>
   <Import Project="$(SolutionDir)MSBuild\DataObjects.Net.InternalBuild.targets" />
   <ItemGroup Condition="'$(TargetFramework)'=='net6.0'">