chore(ansible): add RHEL 9.6 and RHEL 10 s390x images

[jdao-rh]

Description

Adds rhel 9 and rhel 10 images to the CI

Checklist

• Investigated and inspected CI test results
• Updated documentation accordingly

Automated testing

• Added unit tests
• Added integration tests
• Added regression tests

If any of these don't apply, please comment below.

Testing Performed

Will be tested via CI
TODO(replace-me)
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[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 27.34%. Comparing base (473345e) to head (2e64140).
⚠️ Report is 4 commits behind head on master.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #3400   +/-   ##
=======================================
  Coverage   27.34%   27.34%           
=======================================
  Files          95       95           
  Lines        5420     5420           
  Branches     2545     2545           
=======================================
  Hits         1482     1482           
  Misses       3211     3211           
  Partials      727      727           

Flag	Coverage Δ
collector-unit-tests	27.34% <ø> (ø)

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✨ Finishing Touches

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• Commit unit tests in branch jdao/s390x-update-ci-rhel-images

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[Molter73]

Hi @jdao-rh, sorry for the delay reviewing this. It looks like you are hitting some auth issues similar to the ones in #3390 w.r.t the location of podman authorization files, can you try to pull the changes needed and see if the test runs? I can help you pinpoint what is needed.

[Molter73]

Thanks for this @jdao-rh! The PR looks good, I have just one last question about the RHEL 9 version. The changes seem to suggest we should be using RHEL 9.6, however, when I check the collector logs in the tests I see that it is actually using RHEL 9.2, is this expected/can we do something about it?

[INFO    2026/06/18 02:44:01] Collector Version: 3.25.0-28-g0134089dd8
[INFO    2026/06/18 02:44:01] OS: Red Hat Enterprise Linux 9.2 (Plow)
[INFO    2026/06/18 02:44:01] Kernel Version: 5.14.0-284.30.1.el9_2.s390x
[INFO    2026/06/18 02:44:01] Architecture: s390x

https://github.com/stackrox/collector/actions/runs/27732228435?pr=3400

Still need to address one question

[jdao-rh]

Thanks for this @jdao-rh! The PR looks good, I have just one last question about the RHEL 9 version. The changes seem to suggest we should be using RHEL 9.6, however, when I check the collector logs in the tests I see that it is actually using RHEL 9.2, is this expected/can we do something about it?

[INFO    2026/06/18 02:44:01] Collector Version: 3.25.0-28-g0134089dd8
[INFO    2026/06/18 02:44:01] OS: Red Hat Enterprise Linux 9.2 (Plow)
[INFO    2026/06/18 02:44:01] Kernel Version: 5.14.0-284.30.1.el9_2.s390x
[INFO    2026/06/18 02:44:01] Architecture: s390x

https://github.com/stackrox/collector/actions/runs/27732228435?pr=3400

Oh good catch, I will check that image i uploaded for rhel 9. Will update to a rhel 9.6 image

[jdao-rh]

@Molter73 The image has been updated to rhel 9.6. However now the CI is running 3 versions of RHEL, and I find the testing to a bit flaky (had to retry for this pr's tests to pass).