samples: sensor: accel_trig: add arduino_gpio req + platform_allow entry

sample.sensor.accel_trig.shield-tap has a DT overlay that expects the
presence of an arduino_header, so add the appropriate dependency to only
build the sample against supported boards.

As per samples guidelines, use platform_allow to limit CI to run only on
a configuration that's actually been tested (and is documented in the
README)

Signed-off-by: Benjamin Cabé <[email protected]>

Author: kartben

samples/sensor/accel_trig/sample.yaml

@@ -49,6 +49,9 @@ tests:
       - CONFIG_SAMPLE_TAP_DETECTION=y
     depends_on:
       - arduino_i2c
+      - arduino_gpio
+    platform_allow:
+      - nrf52dk/nrf52832
     integration_platforms:
       - nrf52dk/nrf52832
   sample.sensor.accel_trig.generic-tap: