Align all existing samples/tests/applications which
contains nrf54l15pdk/nrf54l15/* by adding
nrf54l15dk/nrf54l15/* to enable twister builds.
Signed-off-by: Katarzyna Giądła <katarzyna.giadla@nordicsemi.no>
Signed-off-by: Grzegorz Chwierut <grzegorz.chwierut@nordicsemi.no>
Add test which validates behavior of the UART driver when there
are errors on the receiver line.
Signed-off-by: Krzysztof Chruściński <krzysztof.chruscinski@nordicsemi.no>
