[BUG] Python - generated code is the same with urllib3 and asyncio in additional-properties

Bug Report Checklist

• Have you provided a full/minimal spec to reproduce the issue?
• Have you validated the input using an OpenAPI validator (example)?
• Have you tested with the latest master to confirm the issue still exists?
• Have you searched for related issues/PRs?
• What's the actual output vs expected output?
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Description

Hello! I'm trying to generate python lib with asyncio using CLI and I'm not really able to generate any other code than source with urllib3.

I'd expect to see different size of the files when using different --additional-properties=library=.... Is this feature working or am I missing something? If so, what should I change in the lines at the bottom? 🤔

Thank you! ❤️

openapi-generator version

5.2.1

OpenAPI declaration file content or url

I don't think this matters

Generation Details

openapi-generator-cli generate -i openapi.json -g python -o ./client-experimental-async --additional-properties=library=asyncio --additional-properties=packageName=vectorization_openapi_client

openapi-generator-cli generate -i openapi.json -g python -o ./client-experimental-tornado --additional-properties=library=tornado --additional-properties=packageName=vectorization_openapi_client

Start by reproducing the two openapi-generator-cli commands with the Python generator and compare the generated asyncio, tornado, and urllib3 clients. Trace how the Python generator handles the library additional property, then confirm that each supported library produces its expected distinct output and add or run coverage for the selection behavior.