add `push_to_hub` to pipeline (#29172)
* add `push_to_hub` to pipeline
* fix docs
* format with ruff
* update save_pretrained
* update save_pretrained
* remove unnecessary comment
* switch to push_to_hub method in DynamicPipelineTester
* remove unused imports
* update docs for add_new_pipeline
* fix docs for add_new_pipeline
* add comment
* fix italien docs
* changes to token retrieval for pipelines
* Update src/transformers/pipelines/base.py
Co-authored-by: amyeroberts <22614925+amyeroberts@users.noreply.github.com>
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Co-authored-by: amyeroberts <22614925+amyeroberts@users.noreply.github.com>
