Handle new Transformers v5 return type

[rootonchair]

What does this PR do?

Transformers new return BaseModelOutputWithPooling for get_text_features, get_image_features which cause AttributeError when we call a function available on Tensor

AttributeError: 'BaseModelOutputWithPooling' object has no attribute 'norm'

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📚 Documentation preview 📚: https://torchmetrics--3353.org.readthedocs.build/en/3353/

[bhimrazy]

Thanks @rootonchair for the PR. We will come back to it. Currently, we do not have the setup to test with the newest transformer version, but we will look into it soon. Thanks for your patience.

In the meantime, if you could add more context to the PR description and link to some relevant references, that would be helpful.