update huntsman-pocs installation process and remote archive script

[fergusL]

• change huntsman-pocs to require python>=3.9 (required for panoptes-pocs v0.7.8)
• update git urls in docker files/requirement files
• update remote data archive script to use context manager for ssh/sftp clients
• general refactor of data archiver script

[codecov[bot]]

Codecov Report

Patch and project coverage have no change.

Comparison is base (bca333c) 53.53% compared to head (1d059bd) 53.53%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## develop #598 +/- ## ======================================== Coverage 53.53% 53.53% ======================================== Files 68 68 Lines 4584 4584 Branches 621 621 ======================================== Hits 2454 2454 Misses 2002 2002 Partials 128 128 ```

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