[No QA] Run lint and test jobs in parallel

[roryabraham]

Details

This PR uses a new(ish) GitHub Actions features: reusable workflows. Before we had a hacky workaround in place – a custom action called triggerWorkflowAndWait. By using the native feature we get a better dependency graph, more concise and transparent workflow syntax, and also get to run multiple reusable workflows in parallel, if we want.

Fixed Issues

$ n/a, doing some exploratory/prep work for https://github.com/Expensify/Expensify/issues/195693

Tests

Did some testing over in https://github.com/Andrew-Test-Org/Public-Test-Repo/pull/300.

QA Steps

1. Merge this PR, the preDeploy workflow should run lint and test in parallel.
2. Merge another PR with purposely failing lint.
3. We should get alerted in slack that the preDeploy workflow failed.
4. Merge another PR to revert the purposely failing lint.

[roryabraham]

Nice dependency graph:

[OSBotify]

🚀 Deployed to staging by @roryabraham in version: 1.1.81-0 🚀

platform	result
🤖 android 🤖	failure ❌
🖥 desktop 🖥	success ✅
🍎 iOS 🍎	success ✅
🕸 web 🕸	failure ❌

[OSBotify]

🚀 Deployed to production by @roryabraham in version: 1.1.82-5 🚀

platform	result
🤖 android 🤖	success ✅
🖥 desktop 🖥	success ✅
🍎 iOS 🍎	failure ❌
🕸 web 🕸	success ✅