Better error handling for serial upload failures #701

Job	Run time
tests (ubuntu-latest, tests)	29s
build (ubuntu-latest, noradio)	1m 55s
tests (macos-latest, tests)	30s
build (ubuntu-latest, wifi)	2m 15s
tests (windows-latest, tests_nosan)	1m 15s
build (ubuntu-latest, bt)	2m 7s
build (macos-latest, noradio)	1m 32s
build (macos-latest, wifi)	2m 22s
build (macos-latest, bt)	1m 34s
build (windows-latest, noradio)	5m 10s
build (windows-latest, wifi)	5m 6s
build (windows-latest, bt)	4m 45s
	29m 0s

Provide feedback