Stop inheriting tests!

[Rocketknight1]

When we import a pytest test class like BambaModelTest into another file to inherit from, this creates a reference to the parent class in the new file. When we run pytest new_file.py, both the new child test class and the parent class are run. This was causing the bamba tests to be run in the granitemoehybrid test file and the cohere tests to be run in the cohere2 test file

This PR copies the test code into the new file, replacing the overridden attributes and methods as required, so that there's no reference to the parent class anywhere.

cc @ydshieh

[Rocketknight1]

run-slow: cohere2, granitemoehybrid

[github-actions]

This comment contains run-slow, running the specified jobs:

models: ["models/cohere2", "models/granitemoehybrid"]
quantizations: []

[HuggingFaceDocBuilderDev]

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[ydshieh]

Yes, I agree! Will check the changes but in principle yes

[github-actions]

CI Results

Workflow Run ⚙️

✅ No failing test specific to this PR 🎉 !

[ydshieh]

As talked internally, putting

del xxxTest (the imported one)

at the end of the test file would work

But works for me if you want to go this current version.

Thank you!

[Rocketknight1]

@ydshieh using the del solution instead, since it's a lot simpler

[github-actions]

[For maintainers] Suggested jobs to run (before merge)

run-slow: cohere2, granitemoehybrid