Tab teardown crashing resulting from renewed renderer destruction order issues

[DHowett-MSFT]

I can reliably crash a release build of WT by just closing tabs.

>	TerminalControl.dll!Microsoft::Console::Render::DxEngine::_CreateDeviceResources(const bool) Line 170	C++
 	TerminalControl.dll!Microsoft::Console::Render::DxEngine::StartPaint() Line 692	C++
 	TerminalControl.dll!Microsoft::Console::Render::Renderer::_PaintFrameForEngine(Microsoft::Console::Render::IRenderEngine * const pEngine) Line 90	C++
 	TerminalControl.dll!Microsoft::Console::Render::Renderer::PaintFrame() Line 68	C++
 	[Inline Frame] TerminalControl.dll!Microsoft::Console::Render::RenderThread::_ThreadProc()	C++
 	TerminalControl.dll!Microsoft::Console::Render::RenderThread::s_ThreadProc(void * lpParameter) Line 151	C++

Various things under RenderThread::s_ThreadProc.

If you ask the Renderer what it thinks, it says this:

this->_destructing
true

However, we're here:

terminal/src/renderer/base/renderer.cpp

Lines 59 to 71 in b9d83ba

	HRESULT Renderer::PaintFrame()
	{
	if (_destructing)
	{
	return S_FALSE;
	}
	for (IRenderEngine* const pEngine : _rgpEngines)
	{
	LOG_IF_FAILED(_PaintFrameForEngine(pEngine));
	}
	return S_OK;

We passed the _destructing check and . . . now we're very sad.

[DHowett-MSFT]

This seems worse since #825.