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* add support for `from_pt`

* add tf_flax utility file

* Update src/transformers/modeling_tf_flax_utils.py
Co-authored-by: Sylvain Gugger <35901082+sgugger@users.noreply.github.com>

* remove flax related modifications

* add test

* remove FLAX related commits

* fixup

* remove safetensor todos

* revert deletion
Co-authored-by: Sylvain Gugger <35901082+sgugger@users.noreply.github.com>