* unarchive: use Python's tarfile module for tar listing
fixes https://github.com/ansible/ansible/issues/11348
Depending on the current active locale, `tar`'s file listing can end up
spitting backslash-escaped characters. Unfortunately, when that happens,
we end up with double-escaped backslashes, giving us a wrong path,
making our action fail.
We could try un-double-escaping our paths, but that would be complicated
and, I think, error-prone. The easiest way forward seemed to simply use
the `tarfile` module.
Why use it only for listing? Because the `unarchive` option also
supports the `extra_opts` option, and that supporting this would require
us to mimick `tar`'s interface.
For listing files, however, I don't think that the loss of `extra_opts`
support causes problems (well, I hope so).
* unarchive: re-add xz decompression support
Following previous change to use Python's `tarfile` module for tar file
listing, we lost `xz` decompression support. This commits re-add it by
adding a special case in `TarXzArchive` that pre-decompresses the source
file.
82aeaed45d