samples: boards: st: power_mgmt: wkup_pins: add WBA65 boards

Add WBA65RI Nucleo board to ST wkup_pins board sample.
By the way, sort the board names in sample.yaml.

Signed-off-by: Etienne Carriere <[email protected]>

Author: etienne-lms

samples/boards/st/power_mgmt/wkup_pins/boards/nucleo_wba65ri.overlay

@@ -0,0 +1,15 @@
+/*
+ * Copyright (c) 2025 STMicroelectronics
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/ {
+	aliases {
+		wkup-src = &user_button_1;
+	};
+};
+
+&pwr {
+	status = "okay";
+};

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

@@ -7,14 +7,15 @@ tests:
       "gpio-keys") and dt_compat_enabled("st,stm32-pwr")
     platform_allow:
       - nucleo_c092rc
+      - nucleo_f103rb
       - nucleo_g031k8
+      - nucleo_l152re
       - nucleo_l4r5zi
       - nucleo_u575zi_q
       - nucleo_u5a5zj_q
+      - nucleo_wba55cg
+      - nucleo_wba65ri
       - nucleo_wl55jc
-      - nucleo_f103rb
       - stm32l1_disco
-      - nucleo_l152re
-      - nucleo_wba55cg
     integration_platforms:
       - nucleo_l4r5zi