get_content_url(): If a HEAD fails, return the failing URL

[jwodder]

Closes #980.

[codecov]

Codecov Report

Merging #1107 (f5a6693) into master (647b351) will increase coverage by 0.07%.
The diff coverage is 93.75%.

@@            Coverage Diff             @@
##           master    #1107      +/-   ##
==========================================
+ Coverage   88.82%   88.89%   +0.07%     
==========================================
  Files          78       78              
  Lines        9504     9512       +8     
==========================================
+ Hits         8442     8456      +14     
+ Misses       1062     1056       -6     

Flag	Coverage Δ
unittests	88.89% <93.75%> (+0.07%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
dandi/dandiapi.py	88.07% <90.90%> (+0.17%)	⬆️
dandi/tests/test_dandiapi.py	98.44% <100.00%> (+0.01%)	⬆️
dandi/_version.py	45.96% <0.00%> (+1.75%)	⬆️

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[yarikoptic]

Great, thanks!

[github-actions]

🚀 PR was released in 0.46.2 🚀