transformers

9568b506 - [generate] handle support for cache classes when num enc layers != num dec layers (#40277)

[generate] handle support for cache classes when num enc layers != num dec layers (#40277) * handle support for cache classes when num enc layers != num dec layers * handle overwrites * one more corner case * Update src/transformers/generation/utils.py * Update src/transformers/generation/utils.py * Apply suggestions from code review * handle corner case :o