tests: benchmarks: Add System OFF test with GRTC wakeup.

Extend testcase.yaml with additional scenario.

Signed-off-by: Bartlomiej Buczek <[email protected]>

Author: nordic-babu

tests/benchmarks/current_consumption/system_off/testcase.yaml

@@ -33,3 +33,16 @@ tests:
       pytest_root:
         - "${CUSTOM_ROOT_TEST_DIR}/test_measure_power_consumption.py::test_measure_and_data_dump_power_consumption_with_wakeups"
     timeout: 80
+  benchmarks.current_consumption.systemoff.grtc_wakeup:
+    platform_allow:
+      - nrf54l15dk/nrf54l15/cpuapp
+    integration_platforms:
+      - nrf54l15dk/nrf54l15/cpuapp
+    extra_configs:
+      - CONFIG_GRTC_WAKEUP_ENABLE=y
+    harness: pytest
+    harness_config:
+      fixture: ppk_power_measure
+      pytest_root:
+        - "${CUSTOM_ROOT_TEST_DIR}/test_measure_power_consumption.py::test_measure_and_data_dump_power_consumption_with_grtc_wakeups"
+    timeout: 80