samples: boards: st: power_mgmt: wkup_pins: add nucleo_c092rc

Add an overlay to the st specific power_mgmt wkup_pins sample
for the nucleo_c092rc board.
The user_button on pc13 is used as the wakeup-src.

Signed-off-by: Thomas Stranger <[email protected]>

Author: str4t0m

samples/boards/st/power_mgmt/wkup_pins/boards/nucleo_c092rc.overlay

@@ -0,0 +1,16 @@
+/*
+ * Copyright (c) 2024 STMicroelectronics
+ * Copyright (c) 2025 Thomas Stranger
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/ {
+	aliases {
+		wkup-src = &user_button;
+	};
+};
+
+&pwr {
+	status = "okay";
+};

samples/boards/st/power_mgmt/wkup_pins/sample.yaml

@@ -6,6 +6,7 @@ tests:
     filter: dt_enabled_alias_with_parent_compat("wkup-src",
       "gpio-keys") and dt_compat_enabled("st,stm32-pwr")
     platform_allow:
+      - nucleo_c092rc
       - nucleo_g031k8
       - nucleo_l4r5zi
       - nucleo_u575zi_q