onnxruntime

c02a3861 - [js/web/training] Implemented runEvalStep & runOptimizerStep (#18259)

[js/web/training] Implemented runEvalStep & runOptimizerStep (#18259) ### Description * implemented runEvalStep and runOptimizerStep * added hasEvalModel and hasOptimizerModel boolean fields in TrainingSession representation * added evalInputNames and evalOutputNames fields to TrainingSessionHandler & TrainingSession * removed the inputNamesEncoded and outputNamesEncoded fields from TrainingSessionHandler -- since none of the training methods require the input names and output names as parameters, there's no need to store them. ### Motivation and Context * part of the work for implementing web bindings for training * previous PR: #18250 --------- Co-authored-by: Ashwini Khade <askhade@microsoft.com>