Test diagnostics #394

Job	Run time
diagnostic_aggregator on humble	4m 58s
diagnostic_aggregator on iron	4m 50s
diagnostic_aggregator on rolling	6m 45s
diagnostic_common_diagnostics on humble	4m 21s
diagnostic_common_diagnostics on iron	5m 48s
diagnostic_common_diagnostics on rolling	5m 17s
diagnostic_updater on humble	4m 43s
diagnostic_updater on iron	5m 17s
diagnostic_updater on rolling	5m 6s
self_test on humble	4m 41s
self_test on iron	5m 1s
self_test on rolling	5m 14s
	1h 2m 1s

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