test(image): improve error text

[ST-DDT]

Fixes/improves the error messages in the image integration test.

promise rejected "Error: Bad StatusCode 504 expected 200 for 'undefined'" instead of resolving

location contains the redirect target, so it isn't set for errors.
I also adjusted the no statusCode case to include the address similar to all the other cases.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.96%. Comparing base (56acea3) to head (2b32891).
Report is 4 commits behind head on next.

Additional details and impacted files

@@            Coverage Diff             @@
##             next    #3278      +/-   ##
==========================================
- Coverage   99.97%   99.96%   -0.01%     
==========================================
  Files        2806     2806              
  Lines      217156   217156              
  Branches      982      976       -6     
==========================================
- Hits       217092   217080      -12     
- Misses         64       76      +12     

see 1 file with indirect coverage changes