ROX-28839 - Add RHCOS images to ARM integration tests

[robbycochran]

Description

Adds 4.12, 4.15, and 4.18 OCP versions of RHCOS to ARM integration tests.

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

TODO(replace-me) Use this space to explain how you tested your PR, or, if you didn't test it, why you did not do so. (Valid reasons include "CI is sufficient" or "No testable changes") In addition to reviewing your code, reviewers must also review your testing instructions, and make sure they are sufficient.

For more details, ref the Confluence page about this section.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 28.51%. Comparing base (7e0101f) to head (b8bc904). Report is 6 commits behind head on master.

:white_check_mark: All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2076      +/-   ##
==========================================
- Coverage   28.52%   28.51%   -0.01%     
==========================================
  Files          94       94              
  Lines        5757     5759       +2     
  Branches     2547     2547              
==========================================
  Hits         1642     1642              
- Misses       3393     3395       +2     
  Partials      722      722              

Flag	Coverage Δ
collector-unit-tests	28.51% <ø> (-0.01%)	:arrow_down:

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