german training, accelerate and model sharing
another continue of https://github.com/huggingface/transformers/issues/18564 @sgugger 
waiting for the tests and docs rendering by HF docs bot to take a final view<|||||>You might need an empty commit to re-trigger the doc build job.<|||||>_The documentation is not available anymore as the PR was closed or merged._<|||||>seems like all links are working now
ready to merge from my side