refactor: streamline tests and add more

[cjumel]

Description

This PR refactors the tests to leverage the pytest.mark.parameterize syntax and removes most of the duplicate in the test files. This made me able to test a bit more (some more usecases, and more tests, like the check of the data sent to the request) while also reducing the number of test lines by half.

Doing so I realized a lack of systematization in the way we handle default parameters: sometimes they were not sent to the API at all, sometimes with the SDK default value. If SDK & API defaults are the same, this doesn't change a thing, but otherwise it might create surprises, so I made sure the default SDK parameters are always passed.

Checklist

• I have installed pre-commit on this project (for instance with the make install-dev command)
  before creating any commit, or I have run successfully the make lint command on my changes
• I have run successfully the make test command on my changes
• I have updated the README.md if my changes affected it

[glm3]

lgtm