DM-48052: Fix intermittent failure in unit tests

[dhirving]

testRetrieveAll in test_cliCmdRetrieveArtifacts.py was failing intermittently, any time that the zip index happened to be the second file in the directory listing.

Checklist

• ran Jenkins
• added a release note for user-visible changes to doc/changes
• (if changing dimensions.yaml) make a copy of dimensions.yaml in configs/old_dimensions

[dhirving]

wrong branch name

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.46%. Comparing base (6da1657) to head (f41f5e8).

✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1129   +/-   ##
=======================================
  Coverage   89.46%   89.46%           
=======================================
  Files         366      366           
  Lines       48779    48780    +1     
  Branches     5908     5908           
=======================================
+ Hits        43642    43643    +1     
  Misses       3721     3721           
  Partials     1416     1416           

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