[otci] add method to run shell commands (#7230)
[otci] add method to run shell commands (#7230)


jwhui/openthread,abtink/openthread,abtink/openthread,abtink/openthread,openthread/openthread,jwhui/openthread,srickardti/openthread,openthread/openthread,srickardti/openthread,srickardti/openthread,openthread/openthread,openthread/openthread,srickardti/openthread,abtink/openthread,jwhui/openthread,jwhui/openthread