samples: basic: blinky: add eGPIO testcase

Add eGPIO testcase with icbmsg backend.

Signed-off-by: Magdalena Pastula <[email protected]>

scripts/twister/alt/zephyr/samples/basic/blinky/sample.yaml

@@ -49,3 +49,22 @@ tests:
  regex:
  - "LED state: ON"
  - "LED state: OFF"
+
+ sample.basic.blinky.egpio_icbmsg:
+ sysbuild: true
+ platform_allow:
+ - nrf54l15dk/nrf54l15/cpuapp
+ integration_platforms:
+ - nrf54l15dk/nrf54l15/cpuapp
+ extra_args: SB_CONFIG_SDP=y
+ SB_CONFIG_EGPIO_FLPR_APPLICATION=y
+ SB_CONFIG_EGPIO_BACKEND_ICBMSG=y
+ SB_CONFIG_PARTITION_MANAGER=n
+ EXTRA_DTC_OVERLAY_FILE="./boards/nrf54l15dk_nrf54l15_cpuapp_egpio.overlay"
+ harness: console
+ harness_config:
+ type: multi_line
+ ordered: true
+ regex:
+ - "LED state: ON"
+ - "LED state: OFF"