Stabilize configurations for compat pack (dotnet/corefx#25017)
* Stabilize configurations for Microsoft.Win32.Registry
* Stabilize configurations for System.IO.FileSystem.AccessControl
* Stabilize configurations for System.IO.Packaging
* Stabilize configurations for System.Security.AccessControl
* Stabilize configurations for System.Principal.Windows
* Stabilize configurations for System.ServiceProcess.ServiceController
* Stabilize configurations for System.Text.Encoding.CodePages
* Some extra cleanup
* Fix CI failures
Commit migrated from https://github.com/dotnet/corefx/commit/
39cdb933600c5dcdec1157b8d5755ec37950e2e0