Enforce the _raw_params variable with include_role (#26430)

Currently, when using this test, it fails with the following error
message:

> AttributeError: 'NoneType' object has no attribute 'rfind'

This is because there is no _raw_params value for parent_include.args
here
https://github.com/ansible/ansible/blob/devel/lib/ansible/playbook/included_file.py#L104

This commit ensure the value is specified so it can be reused and hence
not fail at this specific line.

test/integration/ovs.yaml

@@ -18,6 +18,7 @@
     - block:
       - include_role:
           name: openvswitch_db
+          _raw_params: openvswitch_db
         when: "limit_to in ['*', 'openvswitch_db']"
       rescue:
         - set_fact: test_failed=true