cpu_offload: remove all hooks before offload (#7448)
* add remove_all_hooks
* a few more fix and tests
* up
* Update src/diffusers/pipelines/pipeline_utils.py
Co-authored-by: Pedro Cuenca <pedro@huggingface.co>
* split tests
* add
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Co-authored-by: Pedro Cuenca <pedro@huggingface.co>
