[Big refactor] move unets to unets module 🦋 (huggingface#6630)

* move unets to  module 🦋

* parameterize unet-level import.

* fix flax unet2dcondition model import

* models __init__

* mildly depcrecating models.unet_2d_blocks in favor of models.unets.unet_2d_blocks.

* noqa

* correct depcrecation behaviour

* inherit from the actual classes.

* Empty-Commit

* backwards compatibility for unet_2d.py

* backward compatibility for unet_2d_condition

* bc for unet_1d

* bc for unet_1d_blocks

Author: sayakpaul

docs/source/en/api/models/unet-motion.md

@@ -22,4 +22,4 @@ The abstract from the paper is:
 [[autodoc]] UNetMotionModel
 
 ## UNet3DConditionOutput
-[[autodoc]] models.unet_3d_condition.UNet3DConditionOutput
+[[autodoc]] models.unets.unet_3d_condition.UNet3DConditionOutput

docs/source/en/api/models/unet.md

@@ -22,4 +22,4 @@ The abstract from the paper is:
 [[autodoc]] UNet1DModel
 
 ## UNet1DOutput
-[[autodoc]] models.unet_1d.UNet1DOutput
+[[autodoc]] models.unets.unet_1d.UNet1DOutput

docs/source/en/api/models/unet2d-cond.md

@@ -22,10 +22,10 @@ The abstract from the paper is:
 [[autodoc]] UNet2DConditionModel
 
 ## UNet2DConditionOutput
-[[autodoc]] models.unet_2d_condition.UNet2DConditionOutput
+[[autodoc]] models.unets.unet_2d_condition.UNet2DConditionOutput
 
 ## FlaxUNet2DConditionModel
-[[autodoc]] models.unet_2d_condition_flax.FlaxUNet2DConditionModel
+[[autodoc]] models.unets.unet_2d_condition_flax.FlaxUNet2DConditionModel
 
 ## FlaxUNet2DConditionOutput
-[[autodoc]] models.unet_2d_condition_flax.FlaxUNet2DConditionOutput
+[[autodoc]] models.unets.unet_2d_condition_flax.FlaxUNet2DConditionOutput

docs/source/en/api/models/unet2d.md

@@ -22,4 +22,4 @@ The abstract from the paper is:
 [[autodoc]] UNet2DModel
 
 ## UNet2DOutput
-[[autodoc]] models.unet_2d.UNet2DOutput
+[[autodoc]] models.unets.unet_2d.UNet2DOutput

docs/source/en/api/models/unet3d-cond.md

@@ -22,4 +22,4 @@ The abstract from the paper is:
 [[autodoc]] UNet3DConditionModel
 
 ## UNet3DConditionOutput
-[[autodoc]] models.unet_3d_condition.UNet3DConditionOutput
+[[autodoc]] models.unets.unet_3d_condition.UNet3DConditionOutput

examples/community/pipeline_animatediff_controlnet.py

@@ -26,7 +26,7 @@
 from diffusers.loaders import IPAdapterMixin, LoraLoaderMixin, TextualInversionLoaderMixin
 from diffusers.models import AutoencoderKL, ControlNetModel, UNet2DConditionModel, UNetMotionModel
 from diffusers.models.lora import adjust_lora_scale_text_encoder
-from diffusers.models.unet_motion_model import MotionAdapter
+from diffusers.models.unets.unet_motion_model import MotionAdapter
 from diffusers.pipelines.controlnet.multicontrolnet import MultiControlNetModel
 from diffusers.pipelines.pipeline_utils import DiffusionPipeline
 from diffusers.schedulers import (

examples/community/stable_diffusion_controlnet_reference.py

@@ -8,7 +8,7 @@
 from diffusers import StableDiffusionControlNetPipeline
 from diffusers.models import ControlNetModel
 from diffusers.models.attention import BasicTransformerBlock
-from diffusers.models.unet_2d_blocks import CrossAttnDownBlock2D, CrossAttnUpBlock2D, DownBlock2D, UpBlock2D
+from diffusers.models.unets.unet_2d_blocks import CrossAttnDownBlock2D, CrossAttnUpBlock2D, DownBlock2D, UpBlock2D
 from diffusers.pipelines.controlnet.multicontrolnet import MultiControlNetModel
 from diffusers.pipelines.stable_diffusion import StableDiffusionPipelineOutput
 from diffusers.utils import logging

examples/community/stable_diffusion_reference.py

@@ -7,7 +7,7 @@
 
 from diffusers import StableDiffusionPipeline
 from diffusers.models.attention import BasicTransformerBlock
-from diffusers.models.unet_2d_blocks import CrossAttnDownBlock2D, CrossAttnUpBlock2D, DownBlock2D, UpBlock2D
+from diffusers.models.unets.unet_2d_blocks import CrossAttnDownBlock2D, CrossAttnUpBlock2D, DownBlock2D, UpBlock2D
 from diffusers.pipelines.stable_diffusion import StableDiffusionPipelineOutput
 from diffusers.pipelines.stable_diffusion.pipeline_stable_diffusion import rescale_noise_cfg
 from diffusers.utils import PIL_INTERPOLATION, logging

examples/community/stable_diffusion_xl_reference.py

@@ -8,7 +8,7 @@
 
 from diffusers import StableDiffusionXLPipeline
 from diffusers.models.attention import BasicTransformerBlock
-from diffusers.models.unet_2d_blocks import (
+from diffusers.models.unets.unet_2d_blocks import (
     CrossAttnDownBlock2D,
     CrossAttnUpBlock2D,
     DownBlock2D,

examples/research_projects/controlnetxs/controlnetxs.py

@@ -26,7 +26,7 @@
 from diffusers.models.autoencoders import AutoencoderKL
 from diffusers.models.lora import LoRACompatibleConv
 from diffusers.models.modeling_utils import ModelMixin
-from diffusers.models.unet_2d_blocks import (
+from diffusers.models.unets.unet_2d_blocks import (
     CrossAttnDownBlock2D,
     CrossAttnUpBlock2D,
     DownBlock2D,
@@ -36,7 +36,7 @@
     UpBlock2D,
     Upsample2D,
 )
-from diffusers.models.unet_2d_condition import UNet2DConditionModel
+from diffusers.models.unets.unet_2d_condition import UNet2DConditionModel
 from diffusers.utils import BaseOutput, logging