Allowing `bst artifact checkout --tar` to use compression
Description
//: # This MR allows tar artifacts to be compressed via the compression flag, or from detection of the file extension.
Changes proposed in this merge request:
- Compression flag has been added
- Compression flag will override file extension when both are provided
- Where neither are provided, default to uncompressed .tar
#1048 (closed)
This merge request, when approved, will close:Edited by Rebecca Grayson