[release-1.17] Fix test image upload

[knative-prow-robot]

This is an automated cherry-pick of #4228

NONE

[knative-prow]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 47.33%. Comparing base (badf666) to head (548c4d2).

Additional details and impacted files

@@               Coverage Diff                @@
##           release-1.17    #4230      +/-   ##
================================================
- Coverage         47.34%   47.33%   -0.02%     
================================================
  Files               270      270              
  Lines             19011    19011              
================================================
- Hits               9001     8998       -3     
- Misses             9298     9300       +2     
- Partials            712      713       +1     

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[dsimansk]

Duplicate of #4229

/close

[knative-prow]

@dsimansk: Closed this PR.

In response to this:

Duplicate of #4229

/close

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