Support shared tensors (#23871)
* Suport shared storage
* Really be sure we have the same storage
* Make style
* - Refactor storage identifier mechanism
- Group everything into a single for loop
* Make style
* PR
* make style
* Update src/transformers/pytorch_utils.py
Co-authored-by: Sylvain Gugger <35901082+sgugger@users.noreply.github.com>
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Co-authored-by: Sylvain Gugger <35901082+sgugger@users.noreply.github.com>