Add BigBirdPegasus (#10991)
* init bigbird pegasus
* add debugging nb ; update config
* init conversion
* update conversion script
* complete conversion script
* init forward()
* complete forward()
* add tokenizer
* add some slow tests
* commit current
* fix copies
* add docs
* add conversion script for bigbird-roberta-summarization
* remove TODO
* small fixups
* correct tokenizer
* add bigbird core for now
* fix config
* fix more
* revert pegasus-tokenizer back
* make style
* everything working for pubmed; yayygit status
* complete tests finally
* remove bigbird pegasus tok
* correct tokenizer
* correct tests
* add tokenizer files
* finish make style
* fix test
* update
* make style
* fix tok utils base file
* make fix-copies
* clean a bit
* small update
* fix some suggestions
* add to readme
* fix a bit, clean tests
* fix more tests
* Update src/transformers/__init__.py
* Update src/transformers/__init__.py
* make fix-copies
* complete attn switching, auto-padding left
* make style
* fix auto-padding test
* make style
* fix batched attention tests
* put tolerance at 1e-1 for stand-alone decoder test
* fix docs
* fix tests
* correct slow tokenizer conversion
* Apply suggestions from code review
Co-authored-by: Suraj Patil <surajp815@gmail.com>
Co-authored-by: Sylvain Gugger <35901082+sgugger@users.noreply.github.com>
* complete remaining suggestions
* fix test
Co-authored-by: Patrick von Platen <patrick.v.platen@gmail.com>
Co-authored-by: Suraj Patil <surajp815@gmail.com>
Co-authored-by: Sylvain Gugger <35901082+sgugger@users.noreply.github.com>
