fix: oras-go client should fallback to docker config if no credentials specified (cherry-pick 2.13 #18133)

[eestolano]

fix: oras-go client should fallback to docker config if no credentials specified (cherry-pick 2.13 #18133)

[eestolano]

This is a manual cherry-pick because gcp-cherry-pick-bot didn't pick up the /cherry-pick release-2.11, /cherry-pick release-2.12, and /cherry-pick release-2.13 comments in #18133.

(This is my first time filing a PR against Argo CD; please let me know if I need to adjust anything. If and when it's approved, I'll create the equivalent PRs for 2.11 and 2.12.)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 55.04%. Comparing base (af54ef8) to head (fcc6d87).
Report is 46 commits behind head on release-2.13.

Additional details and impacted files

@@               Coverage Diff                @@
##           release-2.13   #20872      +/-   ##
================================================
+ Coverage         55.01%   55.04%   +0.03%     
================================================
  Files               320      320              
  Lines             54735    54743       +8     
================================================
+ Hits              30111    30136      +25     
+ Misses            22045    22035      -10     
+ Partials           2579     2572       -7     

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[crenshaw-dev]

codegen is expected to fail, only other thing to knock out is DCO. Can you fix that check?

[eestolano]

I'm not sure what to do about this DCO check failure -- it looks like the original author's Github email address has changed, and no longer matches the signoff on the original commit:

Commit sha: fcc6d87, Author: Tony Au-Yeung, Committer: Esteban Molina-Estolano; Can not find "Tony Au-Yeung tonyay163@gmail.com", in ["Tony Au-Yeung tony@elevenlabs.io", "Tony Au-Yeung tony@elevenlabs.io", "Tony Au-Yeung tony@elevenlabs.io", "Tony Au-Yeung tony@elevenlabs.io", "Tony Au-Yeung tony@elevenlabs.io", "Tony Au-Yeung tony@elevenlabs.io"].

Should I add my own sign-off to the end of the commit message?