fix broken test expectaions due to new behavior in .Net 8.0

Up until .Net 7.0, interfaces had 2 attributes: Interface + Abstract
In .Net 8.0 interfaces are emited with a third one: BeforeFieldInit

Can be verified with the following bash script:

cd /tmp
rm -rf test
mkdir test
cd test
echo "public interface IFoo {}"  > itf.cs

echo '<Project Sdk="Microsoft.NET.Sdk"><PropertyGroup><TargetFramework>net7.0</TargetFramework></PropertyGroup></Project>'  >  itf.csproj
docker run -it -v /tmp/test/:/code mcr.microsoft.com/dotnet/sdk:7.0 bash -c "cd /code;
dotnet build;
dotnet tool install -g ilspycmd;
DOTNET_ROLL_FORWARD=LatestMajor /root/.dotnet/tools/ilspycmd -il /code/bin/Debug/net7.0/itf.dll > 7.il
"

echo '<Project Sdk="Microsoft.NET.Sdk"><PropertyGroup><TargetFramework>net8.0</TargetFramework></PropertyGroup></Project>'  >  itf.csproj
docker run -it -v /tmp/test/:/code mcr.microsoft.com/dotnet/sdk:8.0 bash -c "cd /code;
dotnet build;
dotnet tool install -g ilspycmd;
DOTNET_ROLL_FORWARD=LatestMajor /root/.dotnet/tools/ilspycmd -il /code/bin/Debug/net8.0/itf.dll > 8.il
"

Cecilifier.Core/Misc/CecilDefinitionsFactory.cs

@@ -385,7 +385,7 @@ public static string DefaultTypeAttributeFor(TypeKind typeKind, bool hasStaticCt
             {
                 TypeKind.Struct => "TypeAttributes.Sealed |" + basicClassAttrs,
                 TypeKind.Class => basicClassAttrs,
-                TypeKind.Interface => "TypeAttributes.Interface | TypeAttributes.Abstract",
+                TypeKind.Interface => "TypeAttributes.Interface | TypeAttributes.Abstract | TypeAttributes.BeforeFieldInit",
                 TypeKind.Delegate => "TypeAttributes.Sealed",
                 TypeKind.Enum => string.Empty,
                 _ => throw new Exception("Not supported type declaration: " + typeKind)