refactor(app): Reconfigure app-shell remote access

[mcous]

overview

This PR fixes a bunch of memory leaks in unit tests surrounding the mocks for app-shell remote module access in app.

• The test setup used to attach a bunch of stuff to global to mimic window in the app UI at runtime
• Those things attached to global were generated by jest.genMockFromModule
• The modules that jest was told to generate mocks from had too much baggage to mock cleanly without memory leaks

Rather than do that, this PR centralizes access to the window attached remote methods and then mocks that single access file. This helps the tests and is also just a better idea.

P.S. If you're interested in the background of why we attach stuff to window for remote module access, see #2374

changelog

• refactor(app): Reconfigure app-shell remote access

review requests

• Tests still pass
• App still functions with app-shell remote stuff, e.g.
  • Updating robots
  • Loading initial app config into state
  • Logging from the UI
  • Redux actions between main and UI processes

In my testing, this PR fixes the heap issues in #3672, so hopefully we can get this one in and then followup with that

[IanLondon]

🌈 tested on 🌆