`autoAttachSmartPattern` should also apply to `autoAttachChildProcesses`

It’s expensive & time-consuming to automatically attach debuggers to every child process when using a task runner like yarn. We don’t need to attach to the yarn process, but can end up getting a large chain of attached debuggers, when we only want to debug the leaf process.

We can fix this in the integrated terminal only by configuring like so:

{
  "debug.javascript.autoAttachFilter": "smart",
  "debug.javascript.autoAttachSmartPattern": ["<PATH_TO_DESIRED_PROGRAM>"]
}

This prevents attaching to everything except the leaf processes that you specify, which greatly improves startup time.

However, this functionality is only enabled in the integrated terminal—nowhere else supports autoAttachSmartPattern.

I think that we should enable autoAttachSmartPattern in the launch.json options and it would function the same way.

Apologies if I’m missing something—I pored over the docs but I couldn’t find a different way to make this work.