Deactivating System.IO.FileSystem.AccessControl tests on uap/uapaot (#19750)

* Deactivating ACL tests on uap/uapaot

* Add reason why disabling tests

* Disabling tests for uap/uapaot

* Changed project configs in test

Author: ViktorHofer

src/System.IO.FileSystem.AccessControl/tests/Configurations.props

@@ -2,7 +2,8 @@
 <Project ToolsVersion="14.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <PropertyGroup>
     <BuildConfigurations>
-      netstandard-Windows_NT;
+      netfx-Windows_NT;
+      netcoreapp-Windows_NT;
     </BuildConfigurations>
   </PropertyGroup>
 </Project>

src/System.IO.FileSystem.AccessControl/tests/FileSystemAclExtensionsTests.cs

@@ -2,7 +2,6 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
-using System;
 using System.Security.AccessControl;
 using Xunit;
 

src/System.IO.FileSystem.AccessControl/tests/System.IO.FileSystem.AccessControl.Tests.csproj

@@ -4,8 +4,10 @@
   <PropertyGroup>
     <ProjectGuid>{5915DD11-5D57-45A9-BFB0-56FEB7741E1F}</ProjectGuid>
   </PropertyGroup>
-  <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'netstandard-Windows_NT-Debug|AnyCPU'" />
-  <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'netstandard-Windows_NT-Release|AnyCPU'" />
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'netfx-Windows_NT-Debug|AnyCPU'" />
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'netfx-Windows_NT-Release|AnyCPU'" />
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'netcoreapp-Windows_NT-Debug|AnyCPU'" />
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'netcoreapp-Windows_NT-Release|AnyCPU'" />
   <ItemGroup>
     <Compile Include="FileSystemAclExtensionsTests.cs" />
     <Compile Include="$(CommonTestPath)\System\AssertExtensions.cs">