**DNM** Test fixes for nigtlies.

[msugakov]

Stacked on top of #21443.
Not to be merged.

I override MAIN_IMAGE_TAG here and I evidenced that this earlier resulted in the same failures as seen in nightlies. See thread under https://redhat-internal.slack.com/archives/C0321S70YK1/p1782139688440169

As it's rebased on top of recent #21443, the tests here shouldn't fail that way.

[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

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 50.07%. Comparing base (f87b6a4) to head (414be2d).

Additional details and impacted files

@@                      Coverage Diff                       @@
##           misha/update-gha-e2e-tests   #21454      +/-   ##
==============================================================
- Coverage                       50.07%   50.07%   -0.01%     
==============================================================
  Files                            2837     2837              
  Lines                          217608   217577      -31     
==============================================================
- Hits                           108969   108945      -24     
+ Misses                         100727   100725       -2     
+ Partials                         7912     7907       -5     

Flag	Coverage Δ
go-unit-tests	50.07% <ø> (-0.01%)	⬇️

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[github-actions]

🚀 Build Images Ready

Images are ready for commit 414be2d. To use with deploy scripts:

export MAIN_IMAGE_TAG=4.12.x-348-g414be2dc3b