Add documentation for launcher without SSH

[dogacancolak-kensho]

#5728

[tjruwase]

@dogacancolak-kensho, please fix formatting issues using https://github.com/microsoft/DeepSpeed/blob/master/CONTRIBUTING.md#prerequisites

[dogacancolak-kensho]

I'm not getting any more errors with pre-commit run --all-files locally. Not sure which file has issues in the CI

[loadams]

I'm not getting any more errors with pre-commit run --all-files locally. Not sure which file has issues in the CI

Hi @dogacancolak-kensho - I pushed a fix, it appears that you have a local version of clang-format that is different than the one we use. I've been able to work around this in the past by using a venv to run the pre-commit formatter.