* Add Swin backbone

* Remove line

* Add code example

Co-authored-by: Niels Rogge <nielsrogge@Nielss-MacBook-Pro.local>

… add_get_encoder_decoder_fsmt

* 'main' of ssh://github.com/huggingface/transformers: (1433 commits)
  Add Universal Segmentation class + mapping (huggingface#20766)
  Stop calling expand_1d on newer TF versions (huggingface#20786)
  Fix object detection2 (huggingface#20798)
  [Pipeline] skip feature extraction test if in `IMAGE_PROCESSOR_MAPPING` (huggingface#20790)
  Recompile `apex` in `DeepSpeed` CI image (huggingface#20788)
  Move convert_to_rgb to image_transforms module (huggingface#20784)
  Generate: use `GenerationConfig` as the basis for `.generate()` parametrization (huggingface#20388)
  Install video dependency for pipeline CI (huggingface#20777)
  Fixing object detection with `layoutlm` (huggingface#20776)
  [Pipeline] fix failing bloom `pipeline` test (huggingface#20778)
  Patch for FlanT5-XXL 8bit support (huggingface#20760)
  Install vision for TF pipeline tests (huggingface#20771)
  Even more validation. (huggingface#20762)
  Add Swin backbone (huggingface#20769)
  Install `torch-tensorrt 1.3.0` for DeepSpeed CI (huggingface#20764)
  Replaces xxx_required with requires_backends (huggingface#20715)
  [CI-Test] Fixes but also skips the mT5 tests (huggingface#20755)
  Fix attribute error problem  (huggingface#20765)
  [Tests] Improve test_attention_outputs (huggingface#20701)
  Fix missing `()` in some usage of `is_flaky` (huggingface#20749)
  ...