[lora] add non-diffusers LoRA loading support for Krea 2 LoRAs (#14074)
Support loading non-diffusers Krea 2 LoRAs (ComfyUI / AI-Toolkit)
Krea 2 LoRAs in the wild are trained against the original krea-ai/krea-2
module names and ship under either the `diffusion_model.` prefix (Krea 2
reference trainer / ComfyUI exports) or the `base_model.model.` prefix
(Ostris AI-Toolkit exports). Add a converter that maps these onto the
diffusers Krea2Transformer2DModel names so they load directly via
`Krea2Pipeline.load_lora_weights`.
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>