Add translation perf_infer_gpu_one for it
[davidegazze](https://github.com/davidegazze)
davidegazze commented [52 minutes ago](https://github.com/huggingface/transformers/pull/22295#issue-1634162644) • 
See issue [https://github.com/https://github.com/https://github.com/huggingface/transformers/issues/17459]
Add Italian translation of perf_infer_gpu_one.mdx and update _toctree.yml.
It's my first pull request, so I hope it's ok

The GitHub-related issue is https://github.com/huggingface/transformers/issues/22294

@omarespejel
@sgugger
_The documentation is not available anymore as the PR was closed or merged._<|||||>cc @nickprock The PR is good to merge with your seal of approval :) <|||||>@amyeroberts LGTM
Thanks @davidegazze 