[nrf fromtree] tests: drivers: comparator: Enable test on nrf54l15 NS

Add overlays required to run the gpio_loopback test on
nrf54l15dk/nrf54l15/cpuapp/ns platform.

Signed-off-by: Sebastian Głąb <[email protected]>
(cherry picked from commit 07d4577)

Author: nordic-segl

tests/drivers/comparator/gpio_loopback/boards/nrf54l15dk_nrf54l15_cpuapp_ns.overlay

@@ -0,0 +1,7 @@
+/*
+ * Copyright (c) 2025 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include "nrf54l15dk_nrf54l15_cpuapp.overlay"

tests/drivers/comparator/gpio_loopback/socs/nrf54l15_cpuapp_ns_nrf_comp.overlay

@@ -0,0 +1,7 @@
+/*
+ * Copyright (c) 2025 Nordic Semiconductor
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include "nrf54l15_cpuapp_nrf_comp.overlay"

tests/drivers/comparator/gpio_loopback/socs/nrf54l15_cpuapp_ns_nrf_lpcomp.overlay

@@ -0,0 +1,7 @@
+/*
+ * Copyright (c) 2025 Nordic Semiconductor
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include "nrf54l15_cpuapp_nrf_lpcomp.overlay"

tests/drivers/comparator/gpio_loopback/testcase.yaml

@@ -24,6 +24,7 @@ tests:
       - nrf5340dk/nrf5340/cpuapp
       - nrf54h20dk/nrf54h20/cpuapp
       - nrf54l15dk/nrf54l15/cpuapp
+      - nrf54l15dk/nrf54l15/cpuapp/ns
       - nrf54lm20dk/nrf54lm20a/cpuapp
       - ophelia4ev/nrf54l15/cpuapp
   drivers.comparator.gpio_loopback.nrf_lpcomp:
@@ -33,5 +34,6 @@ tests:
       - nrf5340dk/nrf5340/cpuapp
       - nrf54h20dk/nrf54h20/cpuapp
       - nrf54l15dk/nrf54l15/cpuapp
+      - nrf54l15dk/nrf54l15/cpuapp/ns
       - nrf54lm20dk/nrf54lm20a/cpuapp
       - ophelia4ev/nrf54l15/cpuapp