DAOS-16514 vos: fix coverity issue (#15083) (#15086) #6721

Job	Run time
Build DAOS (alma.8)	39m 54s
Build DAOS (ARM64) (ubuntu, clang)	38m 12s
Build DAOS (alma.9)	39m 18s
Build DAOS (ARM64) (alma.8, clang)	36m 47s
Create Docker images (ubuntu)	9m 12s
Build DAOS (rocky.8)	39m 4s
Build DAOS (ARM64) (leap.15, clang)	36m 49s
Create Docker images (rocky)	9m 44s
Build DAOS (ubuntu)	35m 24s
Create Docker images (fedora)	9m 59s
Create Docker images (leap.15)	11m 28s
Build DAOS in image (ubuntu, clang)	21m 29s
Run DAOS/NLT tests (ubuntu)	24m 20s
Build DAOS in image (ubuntu, gcc)	23m 6s
Build DAOS in image (rocky, clang)	23m 6s
Build DAOS in image (rocky, gcc)	25m 3s
Build DAOS in image (fedora, clang)	22m 56s
Build DAOS in image (fedora, gcc)	24m 27s
Build DAOS in image (leap.15, clang)	23m 51s
Build DAOS in image (leap.15, gcc)	24m 13s
	8h 38m 22s

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