DM-54466: Fix bug that converts s3:// to s3:/.

[MichelleGower]

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 90.50%. Comparing base (9816d69) to head (ab191b4).
⚠️ Report is 2 commits behind head on main.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #233      +/-   ##
==========================================
+ Coverage   90.42%   90.50%   +0.08%     
==========================================
  Files          51       51              
  Lines        5577     5626      +49     
  Branches      541      544       +3     
==========================================
+ Hits         5043     5092      +49     
  Misses        436      436              
  Partials       98       98              

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