HPCC-10363 Don't convert non-many LOOKUP joins to ALL joins

Signed-off-by: Gavin Halliday <gavin.halliday@lexisnexis.com>
Merge pull request #5109 from ghalliday/issue10363b

HPCC-10363 Don't convert non-many LOOKUP joins to ALL joins

Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>