HPCC-8019 Use resizeRow to scale row tables

Use the new resizeRow with locking callback mechanism in Thor
to resize the row table, avoiding having to allocate new before
freeing old

Signed-off-by: Jake Smith <jake.smith@lexisnexis.com>
Modify (void ** &)rows to *(void ***)(&rows)

Signed-off-by: Jake Smith <jake.smith@lexisnexis.com>
Merge pull request #3733 from jakesmith/resize2-gh-issue8297

HPCC-8019 Use resizeRow to scale row tables

Reviewed-by: Gavin Halliday <ghalliday@hpccsystems.com>