Merge branch 'tools-ynl-convert-samples-into-selftests'

Jakub Kicinski says:

====================
tools: ynl: convert samples into selftests

The "samples" were always poor man's tests, used to manually
confirm that C YNL works as expected. Since a proper tests/
directory now exists move the samples and use the kselftest
harness to turn them into selftests outputting KTAP.
====================

Link: https://patch.msgid.link/20260307033630.1396085-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>