Fix CI tests due to pathlib issues (#2491)
* Fix tests
* Fixup tests
* Fix test
* Actually cast to string!
* Fixup deepspeed
* fsdp and deepspeed fix
* Since we're doing this, may as well get it all
* Stragglers
* Split only if we require config_file
* Make list
* Only convert if it's a path
* type
* Other func
* rm parenth
