Add LCM Scripts

[patil-suraj]

What does this PR do?

[HuggingFaceDocBuilderDev]

The documentation is not available anymore as the PR was closed or merged.

[shuminghu]

Runnning the script would encounter error related to missing argument unet_time_cond_proj_dim.
What's the default dim used for this argument? @patil-suraj @luosiallen

Traceback (most recent call last):
  File "/home/smhu/diffusers/examples/consistency_distillation/train_lcm_distill_sd_wds.py", line 1302, in <module>
    main(args)
  File "/home/smhu/diffusers/examples/consistency_distillation/train_lcm_distill_sd_wds.py", line 857, in main
    teacher_unet.config["time_cond_proj_dim"] = args.unet_time_cond_proj_dim
                                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: 'Namespace' object has no attribute 'unet_time_cond_proj_dim'

[shuminghu]

Runnning the script would encounter error related to missing argument unet_time_cond_proj_dim. What's the default dim used for this argument? @patil-suraj @luosiallen

Traceback (most recent call last):
  File "/home/smhu/diffusers/examples/consistency_distillation/train_lcm_distill_sd_wds.py", line 1302, in <module>
    main(args)
  File "/home/smhu/diffusers/examples/consistency_distillation/train_lcm_distill_sd_wds.py", line 857, in main
    teacher_unet.config["time_cond_proj_dim"] = args.unet_time_cond_proj_dim
                                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: 'Namespace' object has no attribute 'unet_time_cond_proj_dim'

opened an issue in LCM repo:
luosiallen/latent-consistency-model#58