samples bindesc: Add runtime test and change default to native_sim

* In the docs replace references to native_posix with native_sim
* Switch the default test platform to native_sim from native_posix
* Add a runtime check for this sample

Signed-off-by: Alberto Escolar Piedras <alberto.escolar.piedras@nordicsemi.no>

samples/subsys/bindesc/hello_bindesc/README.rst

@@ -27,6 +27,6 @@ To dump all binary descriptors in the image, run:
    west bindesc dump build/zephyr/zephyr.bin
 
 (Note: you can also dump the contents of ``zephyr.elf``, if your build system
-does not produce a ``*.bin`` file, e.g. compiling for ``native_posix``.)
+does not produce a ``*.bin`` file, e.g. compiling for ``native_sim``.)
 
 For more details see :ref:`binary_descriptors` and :ref:`west-bindesc`.

samples/subsys/bindesc/hello_bindesc/sample.yaml

@@ -5,4 +5,16 @@ tests:
     tags: bindesc
     filter: CONFIG_ARCH_SUPPORTS_ROM_START or CONFIG_ARCH_POSIX
     integration_platforms:
-      - native_posix
+      - native_sim
+    harness: console
+    harness_config:
+      type: multi_line
+      ordered: true
+      regex:
+        - "Zephyr version: "
+        - "App version: 1.0.0"
+        - "Build time: "
+        - "Compiler: "
+        - "my_string: Hello world!"
+        - "my_int: 5"
+        - "my_bytes: 01 02 03 04"