Publish the official build to blob storage (#1092)

Publish the official build to blob storage (#1092)

* Publish installers and checksums

- Use the arcade publishing process to publish the installers and checksums
- Remove old blob publishing
- Calculate the product version using an always-suffixed version
- Change the blob path that we should upload to to be Runtime/<version> instead of assets/core-setup/.. to line up with the desired paths.

* Updates for dotnet/runtime

Use InstallerTasksAssemblyPath.

Fail fast on RuntimeNupkgFile item duplicates.

Find some more symbol packages. AllConfigurations symbol nupkgs weren't detected due to different artifact arrangement. There may be more missing, however I did this to do unblock some quick local validation so I'm including it.

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