HPCC-12515 no_datasetfromrow should always traverse input

Signed-off-by: Gavin Halliday <gavin.halliday@lexisnexis.com>
minor concern: no_getgraphresult is not _explicitly_ an included case item within worthGeneratingRowAsSingleActivity, I was wondering if we should conserve this explicitness within the new routine worthGeneratingRowAsSingleActivity(), for whatever reason it was explicitly excluded originally. Perhaps just a comment?