test: CON-1422 vetKD payload builder/verifier unit tests (#3886) #27187

Job	Run time
Bazel Build Fuzzers AFL	1m 37s
Bazel Test All	38m 4s
Bazel Build Fuzzers	3m 13s
Bazel Test macOS Intel	1h 42m 43s
Build IC	10m 22s
Python CI Tests	1m 52s
Cargo Build Release Linux	23s
Cargo Clippy Linux	1m 32s
Build Determinism (//publish/binaries:upload, release, build-ic/release, false)	27s
Build Determinism (//publish/canisters:upload, canisters, build-ic/canisters, false)	28s
Build Determinism (//ic-os/guestos/envs/prod:upload_disk-img, guest-os/update-img, build-ic/icos/...	29s
Build Determinism (//ic-os/hostos/envs/prod:upload_update-img, host-os/update-img, build-ic/icos/...	28s
Build Determinism (//ic-os/setupos/envs/prod:upload_disk-img, setup-os/disk-img, build-ic/icos/se...	31s
	2h 42m 9s

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