fix order of hidden states in text encoder

[eaidova]

What does this PR do?

using sorting breaks topological order of outputs, it keeps output names in alphabetical order, that is different from topological if model has > 10 layers (e.g. hiden_states.0, hidden_states.1, ..., hidden_states.9, hidden_states.10 we got hidden_states.0, hidden_tates.1, hidden_states.10, hidden_states.2, ...., hidden_states.9) that significantly impact model accuracy for sdxl.

Before submitting

• This PR fixes a typo or improves the docs (you can dismiss the other checks if that's the case).
• Did you make sure to update the documentation with your changes?
• Did you write any new necessary tests?

[HuggingFaceDocBuilderDev]

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