Cleaning up some test logic

[dr-rodriguez]

This fixes some of the testing issues, particularly an issue with running astrodb_utils tests through the template repo.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 72.14%. Comparing base (81b4361) to head (c14de36).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #220      +/-   ##
==========================================
+ Coverage   71.54%   72.14%   +0.59%     
==========================================
  Files          19       19              
  Lines        1652     1630      -22     
  Branches      212      209       -3     
==========================================
- Hits         1182     1176       -6     
+ Misses        382      367      -15     
+ Partials       88       87       -1     

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