pgsql: Fix ordering of GRANT commands in pg_dump for database creation

Fix ordering of GRANT commands in pg_dump for database creation

This uses a method similar to 68a7c24f, which guarantees that GRANT
commands using the WITH GRANT OPTION are dumped in a way so as cascading
dependencies are respected. As databases do not have support for
initial privileges via pg_init_privs, we need to repeat again the same
ACL reordering method.

ACL for databases have been moved from pg_dumpall to pg_dump in v11, so
this impacts pg_dump for v11 and above, and pg_dumpall for v9.6 and
v10.

Discussion: https://postgr.es/m/15788-4e18847520ebcc75@postgresql.org
Author: Nathan Bossart
Reviewed-by: Haribabu Kommi
Backpatch-through: 9.6

Branch
------
REL_11_STABLE

Details
-------
https://git.postgresql.org/pg/commitdiff/8357a413f439887ef243f9efd2417b1a7409e694

Modified Files
--------------
src/bin/pg_dump/pg_dump.c | 35 ++++++++++++++++++++++++++++-------
1 file changed, 28 insertions(+), 7 deletions(-)