Drops PG14 support #7176

Job	Run time
get_postgres_versions_from_file	6s
rpm_build_tests (oraclelinux-8, 15)	1m 58s
rpm_build_tests (oraclelinux-8, 16)	1m 58s
deb_build_tests (debian-bookworm-all, 15)	2m 17s
rpm_build_tests (oraclelinux-8, 17)	2m 3s
deb_build_tests (debian-bookworm-all, 16)	2m 14s
rpm_build_tests (almalinux-8, 15)	1m 50s
deb_build_tests (debian-bookworm-all, 17)	2m 15s
rpm_build_tests (almalinux-8, 16)	1m 55s
deb_build_tests (debian-bullseye-all, 15)	1m 55s
rpm_build_tests (almalinux-8, 17)	1m 52s
deb_build_tests (debian-bullseye-all, 16)	2m 6s
rpm_build_tests (almalinux-9, 15)	1m 53s
deb_build_tests (debian-bullseye-all, 17)	2m 5s
deb_build_tests (ubuntu-focal-all, 15)	2m 0s
deb_build_tests (ubuntu-focal-all, 16)	1m 58s
rpm_build_tests (almalinux-9, 16)	1m 53s
deb_build_tests (ubuntu-focal-all, 17)	2m 1s
rpm_build_tests (almalinux-9, 17)	1m 54s
deb_build_tests (ubuntu-jammy-all, 15)	2m 10s
deb_build_tests (ubuntu-jammy-all, 16)	2m 10s
deb_build_tests (ubuntu-jammy-all, 17)	2m 12s
	42m 45s

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