[`Peft` / `Lora`] Add `adapter_names` in `fuse_lora` (#5823)
* add adapter_name in fuse
* add tesrt
* up
* fix CI
* adapt from suggestion
* Update src/diffusers/utils/testing_utils.py
Co-authored-by: Benjamin Bossan <BenjaminBossan@users.noreply.github.com>
* change to `require_peft_version_greater`
* change variable names in test
* Update src/diffusers/loaders/lora.py
Co-authored-by: Benjamin Bossan <BenjaminBossan@users.noreply.github.com>
* break into 2 lines
* final comments
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Co-authored-by: Sayak Paul <spsayakpaul@gmail.com>
Co-authored-by: Benjamin Bossan <BenjaminBossan@users.noreply.github.com>
