benchmarks: migrate diff-similarity verifiers #7

Job	Run time
smoke-runtime (baseline, configs/registry_smoke_matrix.json)	14m 30s
contract-audit	1m 36s
smoke-runtime (artifact-only, configs/registry_smoke_artifact_matrix.json)	12m 18s
smoke-runtime (sg-only, configs/registry_smoke_matrix.json)	14m 49s
	43m 13s

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