Populate deploy checklists with PRs from both repos

[roryabraham]

Problem

HybridApp includes code from two repos - E/App and E/Mobile-Expensify. However, our deploy checklists only include code from E/App. This means that we (and applause) do not have a clear view of when Mobile-Expensify PRs are deployed, nor a complete and accurate view of all pull requests introducing code changes in a given release.

Solution

• Populate deploy checklists with pull requests from both E/App and E/Mobile-Expensify
• Fix the diff link and include a Mobile-Expensify diff link in the checklist as well
• Leave deploy comments on Mobile-Expensify PRs when they're deployed in HybridApp.

[melvin-bot]

Triggered auto assignment to @dylanexpensify (NewFeature), see https://stackoverflowteams.com/c/expensify/questions/14418#:~:text=BugZero%20process%20steps%20for%20feature%20requests for more details. Please add this Feature request to a GH project, as outlined in the SO.

[melvin-bot]

⚠️ It looks like this issue is labelled as a New Feature but not tied to any GitHub Project. Keep in mind that all new features should be tied to GitHub Projects in order to properly track external CAP software time ⚠️

[melvin-bot]

Triggered auto assignment to Design team member for new feature review - @dannymcclain (NewFeature)

[roryabraham]

HOLD on #55403