HPCC-10606 Add STREAMED flag to JOIN to prevent implicit keyed or lookup

Signed-off-by: Gavin Halliday <gavin.halliday@lexisnexis.com>
HPCC-12373 Convert global streamed join against key to keyeddistribute

Also refactor the JoinSortInfo class

Signed-off-by: Gavin Halliday <gavin.halliday@lexisnexis.com>