Create GH action that checks for draft PRs in Mobile & Extension Repo

When reviewing a core PR, it is part of the checklist to actually create test drive PRs on both clients. This is not done reliably. As a result, porting controllers upgrades to client when you're not the IC that wrote it is a bit cumbersome and time consuming.

This ticket is intended to create a GH action that will check for draft PRs in Mobile & Extension Repo. If there are no PRs then the GH action will fail and provide instructions to the developer to open PRs in the repos.

Start by reviewing the repository's GitHub Actions configuration and the requirements for checking draft PRs in the Mobile and Extension repositories. The work is done when the action detects whether those repositories have draft PRs, fails when none exist, and provides instructions for opening them.

Written by the indexing model from the issue text.