Alarms no longer force idle #841

Job	Run time
tests (ubuntu-latest, tests)	29s
tests (macos-latest, tests)	39s
build (ubuntu-latest, noradio)	2m 7s
tests (windows-latest, tests_nosan)	1m 21s
build (ubuntu-latest, wifi)	2m 18s
build (ubuntu-latest, bt)	2m 9s
build (macos-latest, noradio)	1m 28s
build (macos-latest, wifi)	1m 41s
build (macos-latest, bt)	1m 50s
build (windows-latest, noradio)	5m 14s
build (windows-latest, wifi)	5m 33s
build (windows-latest, bt)	4m 18s
	29m 7s

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