Move corefxlab to arcade (dotnet#2795)

* Add eng folder

* First cut of moving corefxlab to arcade

* Move arcade symbol validation inside official buil

* Move base yml file to root

* Arcade will build, publish packages and symbols

* UpdateXlf. Review this

* Arcade Update to version 5.0.0-beta.19575.4 to include Experimental Channel

* Remove property that was causing the build to fail

* Moving global properties to the main Yaml instead of step in order to unblock publishing

* Committing xlfs and changing the build script to not update Xlf on build

* clean up corefxlab-base.yml

* sq

* Delete unused files and scripts

* Get rid of all the xlf stuff

* Remove UpdateXlfOnBuild for non-NT builds

* Minor cleanup

* More cleanup

* update eng\build.sh permission

* Rename to Nuget.config

* sq

* Remove the runtime spec from global.json

* Don't publish test projs

* Typo

* Move version prefix to versions.props
Change prereleaselabel to alpha

* Increment version number to list as the latest package
Increment version number of Microsoft.Experimental.Collections to list as the latest package
Turn off graph generation

* Update the Readme

* Test removing the scripts folder

* Touch readme to force a change

* Address Jose's comments

* Typo

* Move versions to eng/versions.props

* Benchmark.proj needs to refer to xunit

* Clean up dependencies.props

* Remove dependencies.props

Co-authored-by: Jose Perez Rodriguez <joperezr@microsoft.com>

Author: Prashanth Govindarajan

tests/Microsoft.Data.Analysis.Tests/Microsoft.Data.Analysis.Tests.csproj

@@ -6,9 +6,6 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.9.0" />
-    <PackageReference Include="xunit" Version="2.4.0" />
-    <PackageReference Include="xunit.runner.visualstudio" Version="2.4.0" />
     <PackageReference Include="Microsoft.ML" Version="1.0.0" />
   </ItemGroup>