unet check length inputs

[williamberman]

re: #2277 + added length checks to block types

[HuggingFaceDocBuilderDev]

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

[patrickvonplaten]

Seems like some fast tests are failing will correct them quickly with the printing test tools, so that you can do it next time :-)

1. Copy-paste all the test failures from: https://github.com/huggingface/diffusers/actions/runs/4161816897/jobs/7200239166#step:6:4144
2. Extract only the test function names from that file so that you get:

tests/pipelines/stable_diffusion_2/test_stable_diffusion_depth.py::StableDiffusionDepth2ImgPipelineFastTests::test_stable_diffusion_depth2img_default_case
tests/pipelines/stable_diffusion_2/test_stable_diffusion_depth.py::StableDiffusionDepth2ImgPipelineFastTests::test_stable_diffusion_depth2img_multiple_init_images
tests/pipelines/stable_diffusion_2/test_stable_diffusion_depth.py::StableDiffusionDepth2ImgPipelineFastTests::test_stable_diffusion_depth2img_negative_prompt
tests/pipelines/stable_diffusion_2/test_stable_diffusion_depth.py::StableDiffusionDepth2ImgPipelineFastTests::test_stable_diffusion_depth2img_pil

and save in file failures.txt.
3. Add print_tensor_out to all the relevant tests that are failing, e.g. see: ec6eb48
4. Run:

pytest $(tr '\n' ' ' <../test_failures/failures.txt)

5. Now a test_corrections.txt file should have been created at root. Run python utils/overwrite_expected_slice.py --correct_filename test_corrections.txt to automatically fix all the tests.
6. This will look as follows: 64d1727
7. Run tests again with point 4. -> they should all pass now.
8. Clean up PR: dbf78f5

=> Finished! Should take only 5min this way instead of having to tediously print out and copy-paste expected values.

[patrickvonplaten]

@williamberman feel free to merge whenever