PG17 compatibility: account for MAINTAIN privilege in regress tests #6813

Job	Run time
get_postgres_versions_from_file	6s
deb_build_tests (debian-buster-all, 14)	2m 0s
deb_build_tests (debian-buster-all, 15)	1m 53s
deb_build_tests (debian-buster-all, 16)	1m 53s
deb_build_tests (debian-buster-all, 17)	40s
deb_build_tests (debian-bookworm-all, 14)	2m 8s
deb_build_tests (debian-bookworm-all, 15)	2m 7s
deb_build_tests (debian-bookworm-all, 16)	2m 6s
deb_build_tests (debian-bookworm-all, 17)	40s
deb_build_tests (debian-bullseye-all, 14)	1m 58s
deb_build_tests (debian-bullseye-all, 15)	1m 59s
deb_build_tests (debian-bullseye-all, 16)	1m 54s
deb_build_tests (debian-bullseye-all, 17)	42s
deb_build_tests (ubuntu-focal-all, 14)	1m 58s
deb_build_tests (ubuntu-focal-all, 15)	1m 54s
rpm_build_tests (oraclelinux-8, 14)	1m 54s
rpm_build_tests (oraclelinux-8, 15)	1m 59s
deb_build_tests (ubuntu-focal-all, 16)	1m 57s
rpm_build_tests (oraclelinux-8, 16)	1m 55s
deb_build_tests (ubuntu-focal-all, 17)	36s
rpm_build_tests (oraclelinux-8, 17)	10s
deb_build_tests (ubuntu-jammy-all, 14)	2m 13s
rpm_build_tests (almalinux-8, 14)	1m 53s
deb_build_tests (ubuntu-jammy-all, 15)	2m 7s
rpm_build_tests (almalinux-8, 15)	1m 49s
deb_build_tests (ubuntu-jammy-all, 16)	2m 13s
rpm_build_tests (almalinux-8, 16)	1m 51s
deb_build_tests (ubuntu-jammy-all, 17)	36s
rpm_build_tests (almalinux-8, 17)	10s
rpm_build_tests (almalinux-9, 14)	1m 50s
rpm_build_tests (almalinux-9, 15)	1m 50s
rpm_build_tests (almalinux-9, 16)	1m 49s
rpm_build_tests (almalinux-9, 17)	15s
	51m 5s

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