DM-49197: Fix astropy pformat_all deprecation

[dhirving]

Astropy's Table.pformat_all() is now deprecated -- Table.pformat() is an exact replacement as of Astropy v7

Checklist

• ran Jenkins
• added a release note for user-visible changes to doc/changes

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.84%. Comparing base (1164789) to head (1ac8c1f).
Report is 2 commits behind head on main.

✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #325      +/-   ##
==========================================
- Coverage   90.86%   90.84%   -0.03%     
==========================================
  Files          50       50              
  Lines        4686     4686              
  Branches      409      409              
==========================================
- Hits         4258     4257       -1     
  Misses        308      308              
- Partials      120      121       +1     

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