ci: add pd_vddsdio in lightsleep UT tests

- Add pd_vddsdio in lightsleep UT tests to ensure proper functionality

components/esp_system/test_apps/esp_system_unity_tests/pytest_esp_system_unity_tests.py

@@ -10,6 +10,7 @@ from pytest_embedded import Dut
     'config',
     [
         pytest.param('default', marks=[pytest.mark.supported_targets]),
+        pytest.param('pd_vddsdio', marks=[pytest.mark.supported_targets]),
         pytest.param('psram', marks=[pytest.mark.esp32, pytest.mark.esp32s2, pytest.mark.esp32s3]),
         pytest.param('single_core_esp32', marks=[pytest.mark.esp32]),
     ]

components/esp_system/test_apps/esp_system_unity_tests/sdkconfig.ci.pd_vddsdio

@@ -0,0 +1,3 @@
+CONFIG_PM_SLP_IRAM_OPT=y
+CONFIG_ESP_SLEEP_POWER_DOWN_FLASH=y
+CONFIG_ESP_SLEEP_CACHE_SAFE_ASSERTION=y