Add LoRA loading support for Ideogram4Pipeline via a new Ideogram4LoraLoaderMixin and a state-dict…

Add LoRA loading support for Ideogram4Pipeline via a new Ideogram4LoraLoaderMixin and a state-dict…: a task in HF ML Tasksmith (Harbor dataset). Work in /workspace . Submit your fix in the existing Python source files under src/diffusers . Preserve the other public behavior. The environment is…