Adds IBERT to models exportable with ONNX
Adds IBERT to models exportable with ONNX
Hey @MaximovaIrina we recently switched all of our documentation from RST to MDX, so you can rebase on `master` to eliminate the conflict with `docs/source/serialization.rst`<|||||>Checking slow tests for ibert 
![image](https://user-images.githubusercontent.com/36035908/147254715-5affc916-e2c8-4984-acdb-67c5732f1a53.png)
<|||||>Hey @MaximovaIrina would you mind rebasing your branch on `master` and resolving the merge conflicts?

Gently pinging @LysandreJik for his blessing on this PR too :)<|||||>Could you just run the code quality tool to ensure that the code quality passes? You can install them with the following, from the root of your clone:
```
pip install -e ".[quality]"
```
And then run them with:
```
make fixup
```<|||||>Merging this since all the CI checks now pass and we have approval from a core maintainer. Thank you for your contribution @MaximovaIrina 🤗 !