samples: boot: mcuboot_recovery_retention: Add KMU build

Adds a KMU build of this sample

Signed-off-by: Jamie McCrae <[email protected]>

Author: nordicjm

samples/boot/mcuboot_recovery_retention/sample.yaml

@@ -32,3 +32,21 @@ tests:
     tags:
       - sysbuild
       - uart
+  sample.boot.mcuboot_recovery_retention.uart.kmu:
+    sysbuild: true
+    build_only: true
+    integration_platforms:
+      - bm_nrf54l15dk/nrf54l05/cpuapp/s115_softdevice/mcuboot
+      - bm_nrf54l15dk/nrf54l10/cpuapp/s115_softdevice/mcuboot
+      - bm_nrf54l15dk/nrf54l15/cpuapp/s115_softdevice/mcuboot
+    platform_allow:
+      - bm_nrf54l15dk/nrf54l05/cpuapp/s115_softdevice/mcuboot
+      - bm_nrf54l15dk/nrf54l10/cpuapp/s115_softdevice/mcuboot
+      - bm_nrf54l15dk/nrf54l15/cpuapp/s115_softdevice/mcuboot
+    extra_args:
+      - SB_CONFIG_BM_FIRMWARE_LOADER_UART_MCUMGR=y
+      - SB_CONFIG_BM_BOOTLOADER_MCUBOOT_SIGNATURE_USING_KMU=y
+    tags:
+      - sysbuild
+      - uart
+      - kmu