[cache] add a test to confirm we can use cache at train time (#35709)
* add test
* augment test as suggested
* Update tests/utils/test_modeling_utils.py
Co-authored-by: Arthur <48595927+ArthurZucker@users.noreply.github.com>
* rerun tests
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Co-authored-by: Arthur <48595927+ArthurZucker@users.noreply.github.com>