pgsql: Replace perror with custom postgres logging

Replace perror with custom postgres logging

perror() is not used in postgres anymore out of policy, this replaces
the final callsites with the custom postgres logging framework.

Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Reviewed-by: Peter Eisentraut <peter@eisentraut.org>
Discussion: https://postgr.es/m/89B00F63-40F7-4D82-8353-DC9CABBAC1D1@yesql.se

Branch
------
master

Details
-------
https://git.postgresql.org/pg/commitdiff/6929e133b309d5d4568b5ed25b136935f63be618

Modified Files
--------------
src/common/exec.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)