1. Support DotNetBuildPass property
   Only build ProjectToBuild items with DotNetBuildPass
   metadata matching the passed-in value of DotNetBuildPass
   Don't glob for solution files in that build mode.
   Don't invoke the Execute target when nothing should be built.
2. Add SkipProjectToBuildError property to not
   error out when ProjectToBuild items are empty.
   This makes clean-up in source-build's outer build
   infrastructure possible (i.e. removal of Noop.proj)
3. Simplify Publish.proj Exec conditions in Build.proj
4. Add the DotNetBuildPass metadata to the asset manifest
   name when set. Also respect TargetArchitecture and
   TargetOS in the manifest name over Platform and OS.
5. Allow repos to invoke Arcade's Build.proj with the
   `-restore -sign -publish` actions only. For that to
   work, skip the ProjectToBuild empty error check when
   none of the build actions are passed in.

Co-authored-by: Matt Mitchell <mmitche@microsoft.com>

Co-authored-by: Matt Mitchell <mmitche@microsoft.com>