[Data-parallel] Allow DP>1 for world_size > num_gpus on node (8) (#26367)

Signed-off-by: Patrick von Platen <patrick.v.platen@gmail.com>
Signed-off-by: Rui Qiao <ruisearch42@gmail.com>
Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>
Co-authored-by: Rui Qiao <ruisearch42@gmail.com>