init cpm support (#1565)

* feat: init cpm support

* remove dotnet-xunit DotNetCliToolReference

* use VersionOverride for compatibility

Directory.Build.props

@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
+
 <Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <PropertyGroup>
     <CodeAnalysisRuleSet>$(MSBuildThisFileDirectory)\kubernetes-client.ruleset</CodeAnalysisRuleSet>
@@ -36,8 +36,4 @@
   <ItemGroup>
     <None Include="../../logo.png" Pack="true" Visible="false" PackagePath="" />
   </ItemGroup>
-
-  <ItemGroup>
-    <PackageReference Include="Microsoft.VisualStudio.SlnGen" Version="11.2.6" PrivateAssets="all" />
-  </ItemGroup>  
 </Project>