Fix the way SJE removes references from PHVs
Add missing replacement of relids in phv->phexpr. Also, remove extra
replace_relid() over phv->phrels.
Reported-by: Zuming Jiang
Bug: #18187
Discussion: https://postgr.es/m/flat/18187-
831da249cbd2ff8e%40postgresql.org
Author: Richard Guo
Reviewed-by: Andrei Lepikhov