[PATCH v4 2/2] dts: add build arguments to test run configuration

[Patrick Robb]

I think the polish on this patch is okay but also there are some moderate
importance cleanups that are recommended by the AI code review:
https://mails.dpdk.org/archives/test-report/2026-June/1011807.html

If you can't get time for this before RC3 I think we can merge this series,
but some of the cleanups (i.e. safely handling yaml string vs list of
strings format in the test_run.yaml) are valuable and if you can add that
either right now for RC3 or early in the 25.11 release window that is
ideal. Let me know what you think.

Reviewed-by: Patrick Robb <patrickrobb1997 at gmail.com>
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