test: Add in-test-commissioning-method parameter for manual commissio…

…ning validation

Add new parameter to control commissioning flow during tests, allowing manual
validation of the commissioning process instead of auto-commissioning. This
enables test cases to verify terms and conditions acknowledgements during the
commissioning flow.

- Add in-test-commissioning-method parameter to test flags
- Support manual commissioning flow validation
- Enable testing of T&C acknowledgement scenarios

test_collections/matter/sdk_tests/support/tests/python_tests/test_utils.py

@@ -333,6 +333,7 @@ async def test_generate_command_arguments_omit_comissioning_method() -> None:
 
     assert [
         "--trace-to json:log",
+        "--in-test-commissioning-method on-network",
         "--discriminator 456",
         "--passcode 8765",
     ] == arguments