fix tests failure caused by version incompatibility

[thinkall]

Why are these changes needed?

Pyspark now has 3.4.0 and transformers has 4.28.0, which fails test/spark/test_0sparkml.py and all the nlp tests.

Related issue number

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[thinkall]

https://github.com/microsoft/FLAML/actions/runs/4698911242/jobs/8331756164?pr=995

@liususan091219 nlp test failed:

      y_pred=predictions.predictions,

        tokenizer=self.tokenizer,
        hf_args=self._training_args,
        X=X,
    )

E AttributeError: 'numpy.ndarray' object has no attribute 'predictions'