fix dpo crash in transformers 4.48

[sywangyi]

What does this PR do?

Fixes # (issue)

Before submitting

• This PR fixes a typo or improves the docs (you can dismiss the other checks if that's the case).
• Did you make sure to update the documentation with your changes?
• Did you write any new necessary tests?

[sywangyi]

pytest tests/test_examples.py::MultiCardDPOExampleTester::test_dpo_llama-7b_multi_card -v -s
crash is
[rank4]: Traceback (most recent call last):
[rank4]: File "/workspace/wangyi/optimum-habana/examples/trl/dpo.py", line 257, in
[rank4]: train_result = dpo_trainer.train()
[rank4]: File "/workspace/wangyi/optimum-habana/optimum/habana/transformers/trainer.py", line 599, in train
[rank4]: return inner_training_loop(
[rank4]: File "/workspace/wangyi/optimum-habana/optimum/habana/transformers/trainer.py", line 1063, in _inner_training_loop
[rank4]: tr_loss_step = self.training_step(model, inputs, num_items_in_batch)
[rank4]: File "/workspace/wangyi/optimum-habana/optimum/habana/transformers/trainer.py", line 1632, in training_step
[rank4]: loss = self.compute_loss(model, inputs, num_items_in_batch=num_items_in_batch)
[rank4]: TypeError: DPOTrainer.compute_loss() got an unexpected keyword argument 'num_items_in_batch'

[emascarenhas]

LGTM.