fix(test): FastAPI 0.87.0 - Fixing tests

Fixing the test suite for the new httpx based TestClient introduced with FastAPI 0.87.0

• allow_redirects is deprecated and replaced by follow_redirects
• cookies need to be defined on request instance instead of being passed in the method calls

References:

https://fastapi.tiangolo.com/release-notes/#0870
https://github.com/encode/starlette/pull/1376

Signed-off-by: moson-mo mo-son@mailbox.org