feat: do not add a group by clause to O2O-edges for order by neighbor…

[michaelcaulley]

… terms

this prevents issues with databases that require all selected terms be included in the group by clause. the group by clause is not required if the relationship is O2O, because only one row will be returned if we join on fks.

[michaelcaulley]

@giautm can you help review this change?