Remove dependency on tar for archiving

This is part of the push towards solving #298 (closed) - starting with the removal of the dependency on tar, allowing archives to be created and used on any targeted platform. This support is provided through the use of Thargo which is effectively a wrapper around the archive/tar and compress/gzip core packages.

This MR switches the Bash shell executor over to using the runner itself for archiving purposes, a separate MR will be created to add the required PowerShell commands to make use of this functionality.