Test diagnostics #390

Job	Run time
diagnostic_aggregator on humble	15m 16s
diagnostic_aggregator on iron	4m 43s
diagnostic_aggregator on rolling	5m 33s
diagnostic_common_diagnostics on humble	5m 29s
diagnostic_common_diagnostics on iron	4m 42s
diagnostic_common_diagnostics on rolling	5m 34s
diagnostic_updater on humble	4m 21s
diagnostic_updater on iron	12m 34s
diagnostic_updater on rolling	7m 7s
self_test on humble	4m 14s
self_test on iron	5m 37s
self_test on rolling	12m 49s
	1h 27m 59s

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