pg_dump/psql: properly recognize GP #926

Job	Run time
check-skip	3s
prepare-test-matrix-deb	3s
Build Apache Cloudberry DEB	15m 33s
DEB Install Test Apache Cloudberry	1m 45s
ic-deb-contrib	3m 50s
ic-cbdb-parallel	28m 49s
pax-ic-deb-good-opt-off	24m 20s
gpcontrib-gp-stats-collector	3m 8s
ic-deb-good-opt-on	29m 48s
pax-ic-deb-good-opt-on	27m 19s
ic-deb-good-opt-off	26m 45s
ic-deb-gpcontrib	4m 24s
Generate Apache Cloudberry Build Report	4s
	2h 45m 51s

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