Allows updating the dataset of a `gr.Examples` (#8745)
* helpers
* add changeset
* changes
* add changeset
* changes
* tweak
* format
* example to docs
* add changeset
* fixes
* add tuple
* add changeset
* print
* format
* clean'
* clean
* format
* format backend
* fix backend tests
* format
* notebooks
* comment
* delete demo
* add changeset
* docstring
* docstring
* changes
* add changeset
* components
* changes
* changes
* format
* add test
* fix python test
* use deep_equal
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