rcal-859 Update okify script to use GA directories on artifactory

[ddavis-stsci]

Resolves RCAL-859

Closes #1281

This PR updates the okify script to use the GA directories in artifactory.

Checklist

• added entry in CHANGES.rst under the corresponding subsection
• [N/A] updated relevant tests
• [N/A] updated relevant documentation
• updated relevant milestone(s)
• added relevant label(s)
• [N/a] ran regression tests, post a link to the Jenkins job below. How to run regression tests on a PR

[codecov]

Codecov Report

Attention: Patch coverage is 40.00000% with 3 lines in your changes missing coverage. Please review.

Project coverage is 79.39%. Comparing base (0ad965c) to head (8cb33a1).
Report is 188 commits behind head on main.

Files with missing lines	Patch %	Lines
romancal/scripts/okify_regtests.py	40.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1282      +/-   ##
==========================================
+ Coverage   79.36%   79.39%   +0.02%     
==========================================
  Files         117      117              
  Lines        8079     8076       -3     
==========================================
  Hits         6412     6412              
+ Misses       1667     1664       -3     

Flag	Coverage Δ		*Carryforward flag
nightly	62.84% <ø> (+0.06%)	⬆️	Carriedforward from 0ad965c

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