Fix many type hint errors

[DefTruth]

I'm the maintainer of cache-dit. cache-dit relies on type annotations to match the forward pattern of blocks more precisely. However, I found that there are a large number of type annotation errors in diffusers. For instance, HiDream, HunyuanVideo, cogvideox, auraflow, cogview, lumina, etc. This PR has fixed all related errors.

PTAL ~ @a-r-r-o-w@sayakpaul

for example, fix hidream type hint:

torch.Tensor->Union[torch.Tensor, Tuple[torch.Tensor, torch.Tensor]]

[DefTruth]

@sayakpaul

[sayakpaul]

Thanks so much! Left some comments.

[DefTruth]

@sayakpaul PTAL~

[sayakpaul]

Thanks!

[sayakpaul]

@bot /style

[github-actions]

Style fix is beginning .... View the workflow run here.

[HuggingFaceDocBuilderDev]

The docs for this PR live here. All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update.

[yiyixuxu]

@bot /style

[github-actions]

Style fix is beginning .... View the workflow run here.

[yiyixuxu]

can you run make style? somehow style bot cannot fix the formats here

[DefTruth]

can you run make style? somehow style bot cannot fix the formats here

@yiyixuxu done, PTAL~