Synchrounous API does not validate the status of the target

[xusheng6]

In DebuggerController::Go,

debugger/core/debuggercontroller.cpp

Lines 338 to 347 in 7595ec6

	bool DebuggerController::Go()
	{
	// This is an API function of the debugger. We only do these checks at the API level.
	if (!CanResumeTarget())
	return false;
	std::thread([&]() { GoAndWait(); }).detach();
	return true;
	}

, we check CanResumeTarget before issuing the commands. However, this is not done for all the synchrounous APIs, e.g., GoAndWait

This partially contributes to #672