test: verify CI output comparison diff #90

Job	Run time
output-comparison	21m 49s
lint (18.x)	28s
smoke-test (18.x)	1m 3s
smoke-test (latest)	58s
build-and-test (18.x, assertion-monitor)	48s
build-and-test (18.x, batch-poster-monitor)	40s
root-tests (18.x)	36s
smoke-test (22.x)	57s
build-and-test (18.x, utils)	32s
build-and-test (18.x, retryable-monitor)	31s
	28m 22s

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