[fix] 修复__ReversePInvokeMethod_XXX函数未设置Il2CppThreadContext，导致从native线程回调时获取Thread变量崩溃的bug

Editor/ReversePInvokeWrap/Generator.cs

@@ -31,6 +31,7 @@ namespace HybridCLR.Editor.ReversePInvokeWrap
                     codes.Add($@"
 	{method.ReturnInfo.Type.GetTypeName()} __ReversePInvokeMethod_{methodIndex}({paramDeclaringListWithoutMethodInfoStr})
 	{{
+		il2cpp::vm::ScopedThreadAttacher _vmThreadHelper;
         const MethodInfo* method = MetadataModule::GetMethodInfoByReversePInvokeWrapperIndex({methodIndex});
         {methodTypeDef};
 		{(method.ReturnInfo.IsVoid ? "" : "return ")}((Callback)(method->methodPointerCallByInterp))({paramNameListWithoutMethodInfoStr});