[master] Update dependencies from dotnet/arcade (dotnet/corefx#39279)

[master] Update dependencies from dotnet/arcade (dotnet/corefx#39279)

* Update dependencies from https://github.com/dotnet/arcade build 20190708.1

- Microsoft.DotNet.XUnitExtensions - 2.4.1-beta.19358.1
- Microsoft.DotNet.XUnitConsoleRunner - 2.5.1-beta.19358.1
- Microsoft.DotNet.VersionTools.Tasks - 1.0.0-beta.19358.1
- Microsoft.DotNet.ApiCompat - 1.0.0-beta.19358.1
- Microsoft.DotNet.Arcade.Sdk - 1.0.0-beta.19358.1
- Microsoft.DotNet.Build.Tasks.Configuration - 1.0.0-beta.19358.1
- Microsoft.DotNet.Build.Tasks.Feed - 2.2.0-beta.19358.1
- Microsoft.DotNet.Build.Tasks.Packaging - 1.0.0-beta.19358.1
- Microsoft.DotNet.CodeAnalysis - 1.0.0-beta.19358.1
- Microsoft.DotNet.CoreFxTesting - 1.0.0-beta.19358.1
- Microsoft.DotNet.GenAPI - 1.0.0-beta.19358.1
- Microsoft.DotNet.Helix.Sdk - 2.0.0-beta.19358.1
- Microsoft.DotNet.RemoteExecutor - 1.0.0-beta.19358.1
- Microsoft.DotNet.GenFacades - 1.0.0-beta.19358.1

* Remove code moved to arcade CoreFxTesting

* Disable deps generation on failing projects

* Manual darc update from build '20190709.4'

Commit migrated from https://github.com/dotnet/corefx/commit/dcf1c8f51bcdbd79e08cc672e327d50612690a25