What does this PR do?

This PR makes BLOOM model trained on DeepSpeed Chat can be parallelized. DeepSpeed Chat saves checkpoint like "transformer.word_embedding.weight". so I got an error in this part.

Fixes # (issue) #399

Before submitting

• [x] This PR fixes a typo or improves the docs (you can dismiss the other checks if that's the case).
• [x] Did you read the contributor guideline, Pull Request section?
• [x] Was this discussed/approved via a Github issue or the forum? Please add a link to it if that's the case.
• [ ] Did you make sure to update the documentation with your changes? Here are the documentation guidelines, and here are tips on formatting docstrings.
• [] Did you write any new necessary tests?

Who can review?

@OlivierDehaene