Improve Wan docstrings (#11689) #4735

Job	Run time
Setup Torch Pipelines CUDA Slow Tests Matrix	2m 17s
ONNX CUDA Tests	4m 45s
Torch CUDA Tests (models)	9m 27s
Torch CUDA Tests (lora)	9m 6s
Flax TPU Tests	3m 4s
Torch CUDA Tests (others)	48s
Torch CUDA Tests (single_file)	5m 27s
PyTorch Compile CUDA tests	3m 20s
PyTorch xformers CUDA tests	6m 13s
Examples PyTorch CUDA tests on Ubuntu	38m 58s
Torch CUDA Tests (schedulers)	5m 34s
Torch Pipelines CUDA Tests (cogvideo)	4m 34s
Torch Pipelines CUDA Tests (audioldm2)	2m 49s
Torch Pipelines CUDA Tests (hunyuan_video)	2m 14s
Torch Pipelines CUDA Tests (cogview4)	3m 7s
Torch Pipelines CUDA Tests (controlnet_flux)	3m 13s
Torch Pipelines CUDA Tests (latent_consistency_models)	1m 23s
Torch Pipelines CUDA Tests (controlnet)	13m 0s
Torch Pipelines CUDA Tests (ddpm)	2m 21s
Torch Pipelines CUDA Tests (controlnet_sd3)	3m 9s
Torch Pipelines CUDA Tests (flux)	4m 2s
Torch Pipelines CUDA Tests (hidream_image)	2m 17s
Torch Pipelines CUDA Tests (ip_adapters)	2m 21s
Torch Pipelines CUDA Tests (stable_diffusion)	6m 4s
Torch Pipelines CUDA Tests (ltx)	1m 45s
Torch Pipelines CUDA Tests (pixart_alpha)	1m 1s
Torch Pipelines CUDA Tests (marigold)	1m 56s
Torch Pipelines CUDA Tests (hunyuandit)	1m 3s
Torch Pipelines CUDA Tests (sana)	4m 6s
Torch Pipelines CUDA Tests (stable_diffusion_2)	3m 27s
Torch Pipelines CUDA Tests (stable_diffusion_3)	1m 31s
Torch Pipelines CUDA Tests (stable_diffusion_xl)	5m 6s
Torch Pipelines CUDA Tests (stable_video_diffusion)	56s
Torch Pipelines CUDA Tests (wan)	4m 11s
	2h 44m 35s

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