Patch Mistral Common Tokenizer 2 (#41962)
* Patch Mistral Common Tokenizer 2: fix add_special_tokens
* Fix typos
* Fix typing issue
* Make _get_validation_mode static
* wip
* Add int support to decode
* Add edge test cases
* fix
* Support batch for decode
* fix
* Refactor to private logic of batch_decode
* Add special properties
