Update Scripts for new Batch AI API version

[Stephanie Marker]

The updated batch ai api will introduce changes into the hierarchy of resources and a few new api calls

previously:
resource group > cluster, file server, jobs

now:
resource group > workspace > cluster, file server, experiment > jobs

there's new api commands we also could use like (though these aren't absolutely necessary to deal with the api changes):
az batchai fileserver create....