[examples] add train flux-controlnet scripts in example. (#9324)

* add train flux-controlnet scripts in example.

* fix error

* fix subfolder error

* fix preprocess error

* Update examples/controlnet/README_flux.md

Co-authored-by: Sayak Paul <[email protected]>

* Update examples/controlnet/README_flux.md

Co-authored-by: Sayak Paul <[email protected]>

* fix readme

* fix note error

* add some Tutorial for deepspeed

* fix some Format Error

* add dataset_path example

* remove print, add guidance_scale CLI, readable apply

* Update examples/controlnet/README_flux.md

Co-authored-by: Sayak Paul <[email protected]>

* update,push_to_hub,save_weight_dtype,static method,clear_objs_and_retain_memory,report_to=wandb

* add push to hub in readme

* apply weighting schemes

* add note

* Update examples/controlnet/README_flux.md

Co-authored-by: Sayak Paul <[email protected]>

* make code style and quality

* fix some unnoticed error

* make code style and quality

* add example controlnet in readme

* add test controlnet

* rm Remove duplicate notes

* Fix formatting errors

* add new control image

* add model cpu offload

* update help for adafactor

* make quality & style

* make quality and style

* rename flux_controlnet_model_name_or_path

* fix back src/diffusers/pipelines/flux/pipeline_flux_controlnet.py

* fix dtype error by pre calculate text emb

* rm image save

* quality fix

* fix test

* fix tiny flux train error

* change report to to tensorboard

* fix save name error when test

* Fix shrinking errors

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Co-authored-by: YiYi Xu <[email protected]>
Co-authored-by: Sayak Paul <[email protected]>
Co-authored-by: Your Name <[email protected]>

Author: 4 people