Update ORT training examples & add summarization example (#383)
* Inference with ORTModel
* Clean up unused imports
* Replace Inference session by ort model
* Inference with ORTModel
* Clean up unused imports
* Replace Inference session by ort model
* Update modeling for custom tasks
* Replace in evaluation_loop
* refectoring prediction_loop
* ORTSeq2SeqTrainer refactoring - Inference with ORTModel (#359)
* Override export of ORTSeq2SeqTrainer
* Do not force download by default in ORTModel (#356)
* Update OnnxConfigWithLoss wrapper
* ORT optimizer refactorization (#294)
* Refactorization of ORTOptimizer
* Refactorization of ORTModel
* Adapt examples according to refactorization
* Fix ORTTrainer inference ort subclass parsing
* Replace datasets.load_metric by evaluate
* Add summarization example
* Enable ORT inference
* Fix inference args
* Mention ORT inference in READMEs
* Remove repetitve code in Trainer
* Update examples to trfrs 4.22.1
* Fix qa example prediction error
* Update summarization/README.md
* Fix logger consistency
* Make readme consistent with trfrs
* Put back onnx config with past and loss test
