`servicex dataset delete` CLI command reports "Dataset N not found"

[ponyisi]

Running servicex dataset delete N seems to always print "Dataset N not found" even though the delete succeeds. I suspect this is because the CLI uses the return value of ServiceXClient.delete_dataset to determine what it prints

ServiceX_frontend/servicex/app/datasets.py

Line 122 in c4c8562

result = asyncio.run(sx.delete_dataset(dataset_id))

and following the call chain, it's the return value of ServiceXAdapter.delete_dataset

ServiceX_frontend/servicex/servicex_adapter.py

Line 174 in c4c8562

async def delete_dataset(self, dataset_id=None):

which never actually has a path that returns anything other than None.

[BenGalewsky]

Resolve via #529