Allow rewinding of commands sent via UART buffer #772

Job	Run time
build (ubuntu-latest, noradio)	1m 56s
build (ubuntu-latest, wifi)	2m 7s
tests (ubuntu-latest, tests)	35s
build (ubuntu-latest, bt)	2m 1s
tests (macos-latest, tests)	30s
build (macos-latest, noradio)	1m 44s
tests (windows-latest, tests_nosan)	1m 15s
build (macos-latest, wifi)	1m 42s
build (macos-latest, bt)	1m 49s
build (windows-latest, noradio)	4m 28s
build (windows-latest, wifi)	5m 50s
build (windows-latest, bt)	5m 26s
	29m 23s

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