Trainer - deprecate tokenizer for processing_class (#32385)

* Trainer - deprecate tokenizer for processing_class

* Extend chage across Seq2Seq trainer and docs

* Add tests

* Update to FutureWarning and add deprecation version

docs/source/es/tasks/asr.md

@@ -276,7 +276,7 @@ En este punto, solo quedan tres pasos:
 ...     args=training_args,
 ...     train_dataset=encoded_minds["train"],
 ...     eval_dataset=encoded_minds["test"],
-...     tokenizer=processor.feature_extractor,
+...     processing_class=processor.feature_extractor,
 ...     data_collator=data_collator,
 ...     compute_metrics=compute_metrics,
 ... )

docs/source/es/tasks/image_classification.md

@@ -160,7 +160,7 @@ Al llegar a este punto, solo quedan tres pasos:
 ...     data_collator=data_collator,
 ...     train_dataset=food["train"],
 ...     eval_dataset=food["test"],
-...     tokenizer=image_processor,
+...     processing_class=image_processor,
 ... )
 
 >>> trainer.train()

docs/source/es/tasks/multiple_choice.md

@@ -225,7 +225,7 @@ En este punto, solo quedan tres pasos:
 ...     args=training_args,
 ...     train_dataset=tokenized_swag["train"],
 ...     eval_dataset=tokenized_swag["validation"],
-...     tokenizer=tokenizer,
+...     processing_class=tokenizer,
 ...     data_collator=DataCollatorForMultipleChoice(tokenizer=tokenizer),
 ... )
 

docs/source/es/tasks/question_answering.md

@@ -195,7 +195,7 @@ En este punto, solo quedan tres pasos:
 ...     args=training_args,
 ...     train_dataset=tokenized_squad["train"],
 ...     eval_dataset=tokenized_squad["validation"],
-...     tokenizer=tokenizer,
+...     processing_class=tokenizer,
 ...     data_collator=data_collator,
 ... )
 

docs/source/es/tasks/summarization.md

@@ -155,7 +155,7 @@ En este punto, solo faltan tres pasos:
 ...     args=training_args,
 ...     train_dataset=tokenized_billsum["train"],
 ...     eval_dataset=tokenized_billsum["test"],
-...     tokenizer=tokenizer,
+...     processing_class=tokenizer,
 ...     data_collator=data_collator,
 ... )