Update training_args.py - addition of self.distributed_state when using XPU
Author: Serizao
Pull request: yes

# addition of `self.distributed_state` when using XPU

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# Fixe

In the base code self.distributed_state does not appear to be defined, which causes the script to crash when used on lines 1813 and 1814 in my case.

I therefore propose an update with a definition of this variable when using an XPU

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Comments:
cc @muellerzr @pacman100 

The docs for this PR live [here](https://moon-ci-docs.huggingface.co/docs/transformers/pr_25999). All of your documentation changes will be reflected on that endpoint.