Add packed tensor format support for flex/sdpa/eager through the mask! (#39194)
* Add the necesary logic to mask_utils
* add it everywhere
* Update masking_utils.py
* style
* Update masking_utils.py
* Update modeling_mimi.py
* Update masking_utils.py
* add support for more than batch size 1
* Update masking_utils.py
* add test
* style
* Update test_masking_utils.py
* Update masking_utils.py
* add require_token
* fix tests
* fix