Support some way of launching without debugging like Visual Studio

[felixfbecker]

In Visual Studio, you can press Ctrl+F5 to launch the application without a debugger attached, which i befinicial for performance reasons. For VS Code this would be very helpful, because you don't always want to actually debug a file or actually cannot because there is no debug adapter extension out there yet. Currently, you have to define a "launch" task, which cannot get a keyboard shortcut. Having "Launch without debugging" would be much more semantically correct.

• Introduce a new action in command palette "Launch without debuggin" with keyboard shortcut Ctrl+F5
• If the currently selected configuration has type set, send the debug adapter a launchRequest with the additional argument debug: false
• Make the debug setting type optional. If a configuration does not have a type, it can only be launched without debugging:
  • If runtimeExecutable is set, spawn the runtime executable (java, bash, ...) with the runtimeArguments, program and args.
    Otherwise spawn program with args directly (like a .exe or .bat)
  • program should be allowed to drop the file extension (java needs this for example)
  • Put stdout on the debug console and send input on the debug console to stdin
  • If externalConsole is true, run the script in an external console
  • Support preLaunchTask

Examples:

{
  "name": "Run currently open script",
  "runtimeExecutable": "bash",
  "program": "${file}"
}

{
  "name": "Launch",
  "runtimeExecutable": "java",
  "program": "${workspaceRoot}/MyClass",
  "preLaunchTask": "compile"
}

[weinand]

duplicate of #2780