added pv output for tar

[Mik-TF]

Work Done

• Set tar with pv to get a status of the progress
• Then we get status from rsync (already happening) and from tar (this PR)
• Detail: links for networks are e.g. mainnet, but for qanet it was qa_net, so I updated this too

Detail

• The files are in xz not gzip, despite the gz file extension

References

• Work done with the collaboration of @scottyeager

[Mik-TF]

Closing in favor of branch v2