Rename `/split-names-from-streaming` job runner
Part of https://github.com/huggingface/datasets-server/issues/1086 and https://github.com/huggingface/datasets-server/issues/867
Rename `/split-names-from-streaming` job runner: Part of https://github.com/huggingface/datasets-server/issues/1086 and https://github.com/huggingface/datasets-server/issues/867