Replace accelerator.use_fp16 in examples (#33513)

* Replace `accelerator.use_fp16` in examples

* pad_to_multiple_of=16 for fp8

examples/pytorch/summarization/run_summarization_no_trainer.py

@@ -534,11 +534,17 @@ def main():
         logger.info(f"Sample {index} of the training set: {train_dataset[index]}.")
 
     label_pad_token_id = -100 if args.ignore_pad_token_for_loss else tokenizer.pad_token_id
+    if accelerator.mixed_precision == "fp8":
+        pad_to_multiple_of = 16
+    elif accelerator.mixed_precision != "no":
+        pad_to_multiple_of = 8
+    else:
+        pad_to_multiple_of = None
     data_collator = DataCollatorForSeq2Seq(
         tokenizer,
         model=model,
         label_pad_token_id=label_pad_token_id,
-        pad_to_multiple_of=8 if accelerator.use_fp16 else None,
+        pad_to_multiple_of=pad_to_multiple_of,
     )
 
     def postprocess_text(preds, labels):