Davis added support for VersionTools to be able to pull from a local
filesystem layout that looks like what we have in GitHub on
dotnet/versions.
Start to consume this so a composed build can use this logic to update
dependencies using local version information produced during the build.
- Take the latest VersionTools, so we can take advantage of new features.
- Update what files need to be updated - DependencyVersions.props.
- Clean up the powershell script.
Fix stage0 location to be the same as build.
Fix ReplaceDependencyVersion to only mark IsUpdated = true when the version was actually updated.
Point to core-setup/release/1.0.0.
