This moves the OpenAI Responses API tests under
tests/verifications/openai_api/test_response.py and starts to wire
them up to our verification suite, so that we can test multiple
providers as well as OpenAI directly for the Responses API.
Signed-off-by: Ben Browning <bbrownin@redhat.com>
This extracts out a helper message to convert previous responses to
messages and to convert openai choices (from a chat completion
response) into output messages for the OpenAI Responses output.
Signed-off-by: Ben Browning <bbrownin@redhat.com>
