Test diagnostics #392

Job	Run time
diagnostic_aggregator on humble	5m 50s
diagnostic_aggregator on iron	4m 37s
diagnostic_aggregator on rolling	5m 5s
diagnostic_common_diagnostics on humble	5m 26s
diagnostic_common_diagnostics on iron	5m 21s
diagnostic_common_diagnostics on rolling	5m 7s
diagnostic_updater on humble	4m 15s
diagnostic_updater on iron	4m 10s
diagnostic_updater on rolling	5m 12s
self_test on humble	3m 54s
self_test on iron	4m 39s
self_test on rolling	5m 14s
	58m 50s

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