A new pipeline for inpainting(object removal) is needed!!

**Is your feature request related to a problem? Please describe.**
Thanks for your great work!!
Right now I'm using StableDiffusionInpaintPipeline with fixed prompt(such as "the empty background") to do object removal task, but one thing i've found is that **when the inpaint mask doesn't cover the shadow or hairline, the model will randomly generate objects else in the mask rather than generating pure background,** which is frustrating. I wonder if the inpaint pipeline is trained for removing object ? If not, when will the inpaint model trained for object removal be released(works like LDM inpainting or LaMa)? As this feature can be really useful in practice!

**Describe the solution you'd like**
Plz release the inpaint pipeline specialized for object removal!

**Describe alternatives you've considered**
Give some advice about getting rid of unwanted object generation

unwanted object generation:

Start with StableDiffusionInpaintPipeline and review the issue's mask and prompt behavior, then compare the requested object-removal use case with the referenced LDM inpainting and LaMa approaches. Done would require an agreed model or training scope and a documented pipeline or recommendation, but the issue names no files or tests.

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