GitLab

* Per-folder tests reorganization
Co-authored-by: sgugger <sylvain.gugger@gmail.com>
Co-authored-by: Stas Bekman <stas@stason.org>

* speed up canine and mluke

* speed up mbart and mbart50 toks

* upload files

* make MLukeTokenizerTest fast

* make LukeTokenizerTest fast

* add entry to _toctree.yaml

* implement MLukeTokenizer and LukeForMaskedLM

* update tests

* update docs

* add LukeForMaskedLM to check_repo.py

* update README

* fix test and specify the entity pad id in tokenization_(m)luke

* fix EntityPredictionHeadTransform