feat: refine loRA diffusers to flux conversion logic

[simpletrontdip]

Summary

This PR updates loRA Diffusers -> Flux conversion logic based on its original source:

• Fix the key typos for guidance_in layer keys, as in: https://github.com/huggingface/diffusers/blob/55ac421f7bb12fd00ccbef727be4dc2f3f920abb/scripts/convert_flux_to_diffusers.py#L103-L115
• Add AdaLN layer from norm_out with shift scale swapping, as in : https://github.com/huggingface/diffusers/blob/55ac421f7bb12fd00ccbef727be4dc2f3f920abb/scripts/convert_flux_to_diffusers.py#L263-L268

Related Issues / Discussions

I couldn't load Hyper-FLUX.1-dev-Nsteps-lora.safetensors from https://huggingface.co/ByteDance/Hyper-SD via InvokeUI.

QA Instructions

1. Install Hyper-FLUX 8 steps, type ByteDance/Hyper-SD in the search box.
2. Load and run it with with Flux.dev flow, (to see it fail)
3. Apply the changes
4. Check the output

Merge Plan

Apply the change only, it's a small one

Checklist

• The PR has a short but descriptive title, suitable for a changelog
• Tests added / updated (if applicable)
• Documentation added / updated (if applicable)
• Updated What's New copy (if doing a release after this PR)