tests: drivers: sensor: temp_sensor: Run test on nrf54l15 NS

Enable temp_senor test on nrf54l15dk/nrf54l15/cpuapp/ns platform.

Signed-off-by: Sebastian Głąb <sebastian.glab@nordicsemi.no>
diff --git a/tests/drivers/sensor/temp_sensor/boards/nrf54l15dk_nrf54l15_cpuapp_ns.overlay b/tests/drivers/sensor/temp_sensor/boards/nrf54l15dk_nrf54l15_cpuapp_ns.overlay
new file mode 100644
index 0000000..f1d1d38
--- /dev/null
+++ b/tests/drivers/sensor/temp_sensor/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"