DM-47325: (hotfix) URL quote the config directory for URI test

[timj]

This can be necessary if there are special characters in the parent path.

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

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.46%. Comparing base (d66c8bb) to head (60cf16e).
Report is 2 commits behind head on main.

✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1128   +/-   ##
=======================================
  Coverage   89.46%   89.46%           
=======================================
  Files         366      366           
  Lines       48773    48774    +1     
  Branches     5907     5907           
=======================================
+ Hits        43636    43637    +1     
  Misses       3721     3721           
  Partials     1416     1416           

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