Unpin diffusers and pass onnx exporters tests (#2153)
* test
* remove diffusers from default tests extras
* add diffusers to onnx export and onnxruntime ci
* raise error when incompatible diffusers andtransformers and don't test difusers with transformers 4.36
* subtle
* fix
* fix
* fix installation
* add height width to image inputs to control output image dims
* fix flux test shape
* use transformers main in onnx ci until new release
* fix for cli as well
* use a PIL image
* revert main transformers and disable modernbert
* comment modernbert for now
* style
* remove diff compatibility error
* style
* revert atol to 1e-4
