Fix jobs methods to use function filter correctly

[ElePT]

Summary

This PR addresses a discrepancy in the arguments of the jobs method compared to IBMServerlessClient. In order to be able to test the fix, this PR also includes a quick refactoring of the unit tests, including:

• renaming folder to test to follow qiskit standards
• separating tests into 2 files (one for catalog, one for serverless)
• separating tests into different methods

Details and comments

[HuangJunye]

Everything looks very clear and correct to me. However, I am not very familiar with mocking test so I can't be certain that everything is ok so I am leaving only a comment not an approval.

I was a bit confused at first why test_catalog.py and test_serverless.py are so similar, but it just reflects again that there are two many similar classes and we need to refactor to simplify things.

[ElePT]

I was a bit confused at first why test_catalog.py and test_serverless.py are so similar, but it just reflects again that there are two many similar classes and we need to refactor to simplify things.

We could definitely work on a testing mixer or something of the sorts to avoid code repetition, but to be honest, with 2 tests I didn't want to over-engineer it. In the end, as you said, this reflects the fact that we are not taking advantage of inheritance to speed up development or testing, and we need to keep testing every component independently.

[avilches]

Everything looks very clear and correct to me. However, I am not very familiar with mocking test so I can't be certain that everything is ok so I am leaving only a comment not an approval.

I was a bit confused at first why test_catalog.py and test_serverless.py are so similar, but it just reflects again that there are two many similar classes and we need to refactor to simplify things.

Hi. The test_serverless.py module shouldn't exist in this project, right?. I mean, in this project, the ServerlessClient is just a third party dependency that will likely disappear soon. The QiskitFunctionsCatalog is the only class we should test.

EDIT: Nevermind. I thought the ServerlessClient was the IBMServerlessClient.