DreamLite-base fails to load due to unsupported legacy UNet block type names

`DreamLitePipeline.from_pretrained("carlofkl/DreamLite-base")` currently fails while constructing the UNet because the saved config uses legacy/upstream-style block type names that `DreamLiteUNetModel` does not accept. Minimal repro: ```python from diffusers import DreamLitePipeline pipe = DreamLitePipeline.from_pretrained( "carlofkl/DreamLite-base", torch_dtype=torch.bfloat16 ).to("cuda") ``` Observed error includes: ValueError: DreamLite does not support down_block_type='CrossAttnDown*' and up_block_type='CrossAttnUp*'