Suppress metrics table in passing test runs #5215

Job	Run time
Additional Builds and Concurrency Tests	12m 53s
miri	4m 25s
Measure coverage	26m 29s
Basic Checks	6m 50s
Release builds and tests	9m 26s
sanitize (address)	18m 8s
Slow tests	13m 46s
sanitize (address, multi-threading)	18m 18s
sanitize (leak)	8m 3s
sanitize (leak, multi-threading)	8m 10s
	2h 6m 28s

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