Convert them to native YAML lists. Support for space-separated
lists was deprecated in Twister a long time ago.
Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>
Describe the samples using code-sample directive in preparation for
upcoming changes to the Zephyr documentation that will be leveraging
the provided description and metadata.
Signed-off-by: Benjamin Cabé <benjamin@zephyrproject.org>
