Undo UART looping changes for now (#1367) #832

Job	Run time
tests (ubuntu-latest, tests)	29s
build (ubuntu-latest, noradio)	1m 58s
tests (macos-latest, tests)	30s
build (ubuntu-latest, wifi)	2m 25s
tests (windows-latest, tests_nosan)	1m 30s
build (ubuntu-latest, bt)	2m 11s
build (macos-latest, noradio)	1m 36s
build (macos-latest, wifi)	1m 44s
build (macos-latest, bt)	1m 46s
build (windows-latest, noradio)	5m 1s
build (windows-latest, wifi)	5m 3s
build (windows-latest, bt)	4m 22s
	28m 35s

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