Use pytest `tmp_path` fixture consistently in tests

[caglayantuna]

Currently in v2, when we do local tests, some test functions related to fit algorithms or output settings are creating _outputs folder since FitOutputManager saves logs even without the user input. To fix this, we need to add tmp_path like here. Thus, all temporary log folder will be deleted after local tests.

[KaisaridiSofia]

@MendezSebastianP do you know how to address this?

[MendezSebastianP]

@MendezSebastianP do you know how to address this?

I will have to check how temporary files are handled in local testing. It will be adress in v2.2