Enable netfx testing. (#588)

* Enable netfx testing.

* Skip impacted tests and re-enable netfx testing.

* Remove redundant comment.

* Remove unnecessary project configuration.

* Simplify test server copying.

Author: eiriktsarpalis

Directory.Packages.props

@@ -60,7 +60,7 @@
     <PackageVersion Include="Microsoft.Extensions.Logging.Console" Version="$(System9Version)" />
     <PackageVersion Include="Microsoft.Extensions.Options" Version="$(System9Version)" />
     <PackageVersion Include="Microsoft.Extensions.TimeProvider.Testing" Version="9.5.0" />
-    <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="17.14.0" />
+    <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="17.14.1" />
     <PackageVersion Include="Moq" Version="4.20.72" />
     <PackageVersion Include="OpenTelemetry" Version="1.12.0" />
     <PackageVersion Include="OpenTelemetry.Exporter.InMemory" Version="1.12.0" />
@@ -75,8 +75,8 @@
     <PackageVersion Include="Serilog.Sinks.File" Version="7.0.0" />
     <PackageVersion Include="Serilog" Version="4.3.0" />
     <PackageVersion Include="System.Linq.AsyncEnumerable" Version="$(System10Version)" />
-    <PackageVersion Include="xunit.v3" Version="2.0.2" />
-    <PackageVersion Include="xunit.runner.visualstudio" Version="3.1.0" />
+    <PackageVersion Include="xunit.v3" Version="2.0.3" />
+    <PackageVersion Include="xunit.runner.visualstudio" Version="3.1.1" />
     <PackageVersion Include="System.Net.Http" Version="4.3.4" />
     <PackageVersion Include="JsonSchema.Net" Version="7.3.4" />
   </ItemGroup>