GitLab

* Added Big Bird Fast Tokenizer initial file

* style fixes

* flake fixes

* Added big bird fast tokenizer to init files

* Added big bird fast to Auto tokenization

* fix styles

* minor quality fixes

* Added initial test code

* Fix SpmConverter when precompiled_charsmap doesn't exist

* fixed post processor

* minor style fix

* minor fix input names

* Actually fix identity normalization

* style

* Added token type ids to fast tokenizer

* style

* flake fix

* fix copies
Co-authored-by: Anthony MOI <m.anthony.moi@gmail.com>