pg_dumpall: Fix dump of built-in resource groups
pg_dumpall: Fix dump of built-in resource groups

Currently, pg_dumpall erroneously emits CREATE RESOURCE GROUP statements
for built-in resource groups: admin_group and default_group.
Consequently, this causes pg_upgrade to fail during schema restore
(since the built-in groups already exist in the target cluster).

The bug can be traced to a string comparison being done on the quoted
version of the resource group name. This commit fixes that.

Co-authored-by: Soumyadeep Chakraborty <4ca25fc91a16c8be63095d9d359a14a63b5aed43@gmail.com>
(cherry picked from commit ddf4c55483e45d0879a460a4db366a8f54e6606c)

greenplum-db/gpdb,greenplum-db/gpdb,xinzweb/gpdb,xinzweb/gpdb,xinzweb/gpdb,xinzweb/gpdb,lisakowen/gpdb,adam8157/gpdb,50wu/gpdb,50wu/gpdb,adam8157/gpdb,lisakowen/gpdb,greenplum-db/gpdb,lisakowen/gpdb,greenplum-db/gpdb,adam8157/gpdb,xinzweb/gpdb,50wu/gpdb,adam8157/gpdb,50wu/gpdb,xinzweb/gpdb,50wu/gpdb,lisakowen/gpdb,lisakowen/gpdb,lisakowen/gpdb,adam8157/gpdb,greenplum-db/gpdb,50wu/gpdb,xinzweb/gpdb,greenplum-db/gpdb,greenplum-db/gpdb,xinzweb/gpdb,50wu/gpdb,adam8157/gpdb,adam8157/gpdb,50wu/gpdb,adam8157/gpdb,lisakowen/gpdb,greenplum-db/gpdb,lisakowen/gpdb