image_transforms: fix tensor annotations

[cebtenzzre]

What does this PR do?

pyright complains when I call these functions. This is because their inputs and outputs are ostensibly tensors, but have been annotated with TensorType, which is an enum.

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@yonigozlan @amyeroberts

[yonigozlan]

Hey! not sure if it makes sense to change this, as these functions can also handle numpy "tensors"