test(helm): cover extraction of pull secrets from the default SA

[porridge]

Description

Now that we use a helmtest version with support for testing the lookup function, add test coverage for extraction of pull secret names from the default service account.

This was a warm-up for a fix to ROX-9156, but useful on its own.

Checklist

• Investigated and inspected CI test results
• Unit test and regression tests added
• Evaluated and added CHANGELOG entry if required
• Determined and documented upgrade steps
• Documented user facing changes (create PR based on openshift/openshift-docs and merge into rhacs-docs)

Testing Performed

Here I tell how I validated my change

CI is sufficient.

Reminder for reviewers

In addition to reviewing code here, reviewers must also review testing and request further testing in case the
performed one does not seem sufficient. As a reviewer, you must not approve the change until you understand the
performed testing and you are satisfied with it.

[openshift-ci]

Skipping CI for Draft Pull Request.
If you want CI signal for your change, please convert it to an actual PR.
You can still manually trigger a test run with /test all

[porridge]

/test all

[rhacs-bot]

Images are ready for the commit at 22f8862.

To use with deploy scripts, first export MAIN_IMAGE_TAG=4.3.x-867-g22f8862f4d.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (ce62d07) 47.29% compared to head (d8304f4) 46.66%.
Report is 2 commits behind head on master.

❗ Current head d8304f4 differs from pull request most recent head 22f8862. Consider uploading reports for the commit 22f8862 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #8964      +/-   ##
==========================================
- Coverage   47.29%   46.66%   -0.63%     
==========================================
  Files        2431     2394      -37     
  Lines      165064   160018    -5046     
==========================================
- Hits        78066    74675    -3391     
+ Misses      80548    79122    -1426     
+ Partials     6450     6221     -229     

Flag	Coverage Δ
go-unit-tests	46.66% <ø> (-0.63%)	⬇️

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[porridge]

Not waiting for e2e tests, they are irrelevant to this change.