pageserver: fix AUX key vectored get validation #18770

Job	Run time
check-permissions / check-permissions	1s
cancel-previous-e2e-tests	3s
tag	14s
check-build-tools-image / check-image	4s
build-build-tools-image / check-image / check-image	2s
trigger-custom-extensions-build-and-wait	4m 25s
build-build-tools-image / build-image	0s
build-build-tools-image / merge-images	0s
check-codestyle-rust	14m 48s
check-codestyle-python	3m 0s
build-neon (debug)	9m 50s
build-neon (release)	11m 35s
compute-node-image (v14)	7m 39s
compute-node-image (v15)	7m 44s
get-benchmarks-durations	0s
compute-node-image (v16)	7m 32s
neon-image	11m 7s
vm-compute-node-image (v14)	1m 28s
vm-compute-node-image (v15)	1m 15s
vm-compute-node-image (v16)	2m 51s
test-images	3m 45s
regress-tests (debug, v14)	13m 13s
regress-tests (debug, v15)	13m 2s
regress-tests (debug, v16)	13m 13s
benchmarks	0s
regress-tests (release, v14)	7m 20s
regress-tests (release, v15)	7m 36s
regress-tests (release, v16)	8m 0s
promote-images	1m 15s
trigger-e2e-tests / tag	9s
trigger-e2e-tests / cancel-previous-e2e-tests	1s
trigger-e2e-tests / trigger-e2e-tests	11s
coverage-report (debug)	5m 23s
pin-build-tools-image	0s
deploy	0s
promote-compatibility-data	0s
create-test-report	7m 22s
	2h 44m 8s

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