[modular]pass hub_kwargs to load_config

[yiyixuxu]

download the config file to local_dir too, so that this works

from diffusers import ModularPipelineBlocks

repo_id = "diffusers-internal-dev/krt"
local_dir = "krea-realtime-video"
blocks_1 = ModularPipelineBlocks.from_pretrained(repo_id, local_dir="krea-realtime-video", trust_remote_code=True)
blocks_2 = ModularPipelineBlocks.from_pretrained(local_dir, trust_remote_code=True)
print(f"blocks_1: {blocks_1}")
print(f"blocks_2: {blocks_2}")

[HuggingFaceDocBuilderDev]

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