drivers: video: stm32_dcmipp: move video/ header directory to drivers/

During #89407 a driver-specific header stm32_dcmipp.h got introduced to
support new functionnalities not yet covered by video APIs.
Move this header into a new <include/zephyr/drivers/video/> include
direcctory like what other driver classes do.

Signed-off-by: Josuah Demangeon <[email protected]>

Author: josuah

drivers/video/video_stm32_dcmipp.c

@@ -16,7 +16,7 @@
 #include <zephyr/drivers/video-controls.h>
 #include <zephyr/dt-bindings/video/video-interfaces.h>
 #include <zephyr/logging/log.h>
-#include <zephyr/video/stm32_dcmipp.h>
+#include <zephyr/drivers/video/stm32_dcmipp.h>
 
 #include "video_ctrls.h"
 #include "video_device.h"