tests: subsys: ipc: ipc_sessions: add _no_unbound tests for bsim

Also cover these code paths.

Signed-off-by: Dmitrii Sharshakov <[email protected]>

Author: dsseng

tests/subsys/ipc/ipc_sessions/testcase.yaml

@@ -17,6 +17,22 @@ tests:
       - nrf5340bsim/nrf5340/cpuapp
     extra_args:
       - CONFIG_IPC_TEST_SKIP_CORE_RESET=y
+  ipc.ipc_sessions.nrf5340bsim_cpuapp_no_unbound_cpunet:
+    platform_allow:
+      - nrf5340bsim/nrf5340/cpuapp
+    integration_platforms:
+      - nrf5340bsim/nrf5340/cpuapp
+    extra_args:
+      - CONFIG_IPC_TEST_SKIP_UNBOUND=y
+      - CONFIG_IPC_SERVICE_BACKEND_ICMSG_V1=y
+  ipc.ipc_sessions.nrf5340bsim_cpuapp_cpunet_no_unbound:
+    platform_allow:
+      - nrf5340bsim/nrf5340/cpuapp
+    integration_platforms:
+      - nrf5340bsim/nrf5340/cpuapp
+    extra_args:
+      - CONFIG_IPC_TEST_SKIP_UNBOUND=y
+      - remote_CONFIG_IPC_SERVICE_BACKEND_ICMSG_V1=y
   test.ipc.ipc_sessions.nrf54h20dk_cpuapp_cpurad:
     platform_allow:
       - nrf54h20dk/nrf54h20/cpuapp