Support for STM Expander (#1461) #1000

Job	Run time
tests (macos-latest, tests)	1m 6s
tests (windows-latest, tests_nosan)	1m 22s
build (macos-latest, wifi)	2m 25s
tests (ubuntu-latest, tests)	26s
build (windows-latest, wifi)	7m 3s
build (ubuntu-latest, wifi)	2m 10s
build (macos-latest, bt)	1m 49s
build (windows-latest, noradio)	4m 57s
build (ubuntu-latest, bt)	1m 59s
build (windows-latest, bt)	5m 2s
build (ubuntu-latest, noradio)	1m 49s
build (macos-latest, noradio)	1m 41s
	31m 49s

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