transformers

aa19f478 - Add (M)Luke model training for Token Classification in the examples (#14880)

Add (M)Luke model training for Token Classification in the examples (#14880) * Add Luke training * Fix true label tags * Fix true label tags * Fix true label tags * Update the data collator for Luke * Some training refactor for Luke * Improve data collator for Luke * Fix import * Fix datasets concatenation * Add the --max_entity_length argument for Luke models * Remove unused code * Fix style issues * Fix style issues * Move the Luke training into a separate folder * Fix style * Fix naming * Fix filtering * Fix filtering * Fix filter * Update some preprocessing * Move luke to research_projects * Checkstyle * Address comments * Fix style