#26566 swin2 sr allow in out channels (#26568)
* feat: close #26566, changed model & config files to accept arbitary in and out channels
* updated docstrings
* fix: linter error
* fix: update Copy docstrings
* fix: linter update
* fix: rename num_channels_in to num_channels to prevent breaking changes
* fix: make num_channels_out None per default
* Update src/transformers/models/swin2sr/configuration_swin2sr.py
Co-authored-by: Arthur <48595927+ArthurZucker@users.noreply.github.com>
* fix: update tests to include num_channels_out
* fix:linter
* fix: remove normalization with precomputed rgb values when #input_channels!=#output_channels
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Co-authored-by: marvingabler <marvingabler@outlook.de>
Co-authored-by: Arthur <48595927+ArthurZucker@users.noreply.github.com>
