fix: jamba cache fails to use torch.nn.module
Author: xgal
Pull request: yes




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Fixes # [32853](https://github.com/huggingface/transformers/issues/32853 )
# What does this PR do?
Fix for issue: https://github.com/huggingface/transformers/issues/32853 
AttributeError: 'HybridMambaAttentionDynamicCache' object has no attribute '_modules'


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Comments:
cc @ArthurZucker @gante