samples: wifi: shutdown: Add the nRF91 Series to twister

This is our primary use case for Wi-Fi scan based location accuracy.

Signed-off-by: Chaitanya Tata <Chaitanya.Tata@nordicsemi.no>

samples/wifi/shutdown/sample.yaml

@@ -17,3 +17,11 @@ tests:
       - nrf52840dk_nrf52840
     platform_allow: nrf5340dk_nrf5340_cpuapp nrf52840dk_nrf52840
     tags: ci_build
+  sample.nrf7000_location.shutdown:
+    build_only: true
+    extra_args: SHIELD=nrf7002ek_nrf7000
+    integration_platforms:
+      - nrf9160dk_nrf9160_ns
+      - nrf9161dk_nrf9161_ns
+    platform_allow: nrf9160dk_nrf9160_ns nrf9161dk_nrf9161_ns
+    tags: ci_build