PAX: Fix buffer overflow in pax rmgr desc function #1023

Job	Run time
check-skip	1s
Build Apache Cloudberry	19m 7s
prepare-test-matrix	1s
ic-cbdb-parallel	44m 20s
RPM Install Test Apache Cloudberry	1m 8s
Generate Apache Cloudberry Build Report	1s
	1h 4m 38s

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