Split finishReleaseCycle into two jobs

[roryabraham]

Details

The finishReleaseCycle workflow previously only had on job which ran on ubuntu. However, the bumpVersion action relies on the macOS utility PListBuddy, so it failed. Furthermore, the repo-sync/pull-request action only works on ubuntu. So this PR splits the finishReleaseCycle workflow into two jobs: one that runs ubuntu and another macOS.

Fixes

Failed workflow run: https://github.com/Expensify/Expensify.cash/runs/2144100874?check_suite_focus=true

Tests

To test this workflow, we'll need to:

1. Merge this PR
2. Close an E.cash issue labeled StagingDeployCash

We'll then expect that:

• An automerge PR is created from staging -> production
• A new BUILD version is created off master.
• An automerge PR for that new version is created w/ master as the base. Only the version files should be updated in that PR, and it should be merged.
• Tags should be pushed, and a staging deploy should happen
• A new StagingDeployCash should be triggered.

[roryabraham]

Note that both of these jobs will run asynchronously. I think that's fine and they don't need to be run sequentially in this case, but buddy-check.

[AndrewGable]

I think this looks good, modeled off of the other workflow well. Skipping e2e to get this tested ASAP.

[botify]

@AndrewGable looks like this was merged without passing tests. Please add a note explaining why this was done or remove the Emergency label if this is not an emergency.

[roryabraham]

Testing:

finishReleaseCycle workflow run: https://github.com/Expensify/Expensify.cash/actions/runs/666214402
automerge PR staging -> prod: #1881 (was merged)
new StagingDeployCash: #1883
new version PR against master: #1882 (was merged)
New version staging deploy happened:

• An automerge PR is created from staging -> production
• A new BUILD version is created off master.
• An automerge PR for that new version is created w/ master as the base. Only the version files should be updated in that PR, and it should be merged.
• Tags should be pushed, and a staging deploy should happen
• A new StagingDeployCash should be triggered.

So this is a pass 🎉

[AndrewGable]

🥳