Add launch profile option to use integrated terminal

Today, when launching a console app, a new terminal window is opened.

VS has an integrated terminal that appears within a tool window.

The debugging infrastructure supports a launch option to do this. We just need to plumb it through from the UI, to `launchSettings.json`, to the launch invocation.

We might also want to add an option (Tools|Options) that controls the default value for when the property is not present in the `launchSettings.json`.

For an example of integrating this feature, see https://devdiv.visualstudio.com/DevDiv/_git/WebTools/pullrequest/425844?_a=files&path=/src/ProjectSystem/Web/WebServer/SelfHostWebServer.cs (MS internal).