Some bugs in FLUX pipeline

[chenxiao111222]

Describe the bug

1. missing self.theta in get_1d_rotary_pos_embed:
   https://github.com/huggingface/diffusers/blob/main/src/diffusers/models/embeddings.py#L961-L963
2. if prompt_embeds is None, pooled_prompt_embeds will never be computed:
   https://github.com/huggingface/diffusers/blob/main/src/diffusers/pipelines/flux/pipeline_flux.py#L348-L363

Reproduction

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Logs

No response

System Info

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Who can help?

@yiyixuxu @sayakpaul @DN6 @asomoza

[hlky]

pooled_prompt_embeds has to be passed when prompt_embeds is used so that's ok

diffusers/src/diffusers/pipelines/flux/pipeline_flux.py

Lines 422 to 425 in 8421c14

	if prompt_embeds is not None and pooled_prompt_embeds is None:
	raise ValueError(
	"If `prompt_embeds` are provided, `pooled_prompt_embeds` also have to be passed. Make sure to generate `pooled_prompt_embeds` from the same text encoder that was used to generate `prompt_embeds`."
	)

Would you like to open a PR that passes self.theta to get_1d_rotary_pos_embed?