transformers

cab048fb - [`Trainer`] Force `is_model_parallel` when model is loaded in multiple GPUs using `accelerate` (#22532)

[`Trainer`] Force `is_model_parallel` when model is loaded in multiple GPUs using `accelerate` (#22532) * add `is_model_parallel` arg on Trainer * add warning * adapt from suggestions * revert t5 changes * remove commas * adapt from suggestions