Fix `typing.get_type_hints` call on a `ModelHubMixin` #6993

Job	Run time
build-windows (3.8)	5m 0s
build-ubuntu (3.8, Repository only)	1m 32s
build-ubuntu (3.8, Everything else)	3m 42s
build-ubuntu (3.13, Repository only)	1m 39s
build-ubuntu (3.13, Everything else)	3m 18s
build-ubuntu (3.13, lfs)	58s
build-ubuntu (3.8, fastai)	1m 24s
build-ubuntu (3.10, fastai)	54s
build-ubuntu (3.8, tensorflow)	47s
build-ubuntu (3.10, tensorflow)	1m 0s
build-ubuntu (3.8, Python 3.8, torch_1.11)	1m 12s
build-ubuntu (3.12, torch_latest)	1m 1s
	22m 27s

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