Change automated searching for files using "IRQ_CONNECT()" API not
including <zephyr/irq.h>.
Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>
Add the "zephyr/" prefix to various #include statements that are
preventing the CI form running with LEGACY_INCLUDE_PATH=n.
Signed-off-by: Fabio Baltieri <fabiobaltieri@google.com>