Fix the deprecated calls to loading ZephyrUnittest by replacing them
with `Zephyr COMPONENTS unittest`.
Signed-off-by: Yuval Peress <peress@google.com>
In order to bring consistency in-tree, migrate all tests to the new
prefix <zephyr/...>. Note that the conversion has been scripted, refer
to #45388 for more details.
Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>
