HPCC-8839 Include sizes in key-row size error message

Signed-off-by: Gavin Halliday <gavin.halliday@lexisnexis.com>
Merge pull request #4004 from ghalliday/issue8839

HPCC-8839 Include sizes in key-row size error message

Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>