Add reference_attn & reference_adain support for sdxl (#4502)
* ADD SDXL reference & reference adain
* Update README.md
* Update README.md
* format stable_diffusion_xl_reference.py
* format file
* Format file
* format file
* fix format
* fix format with ruff
* fix format
* Update examples/community/README.md
Co-authored-by: Dhruv Nair <dhruv.nair@gmail.com>
* Update examples/community/README.md
Co-authored-by: Dhruv Nair <dhruv.nair@gmail.com>
* Update README.md
* Update README.md & fix typo
* Update README.md
* fix format
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Co-authored-by: Dhruv Nair <dhruv.nair@gmail.com>