Update gerald for Node 20

[somewhatabstract]

Summary:

This updates the @vercel/ncc dependency to work with Node 20. It also removes our custom workflow template processing in favour of the newer, idiomatic shared actions approach that GitHub workflows now support. Finally, I tidied up some of the workflows to be a little easier to follow and to drop some steps that seem redundant (line running yarn global add without any packages).

It seems odd that we run jest twice - we can probably be more idiomatic here and drop our custom actions, only running jest once with coverage.

Issue: FEI-5545

Test plan:

yarn test
yarn build

Push this PR and see what the workflows do.

[khan-actions-bot]

Gerald

Required Reviewers

• @Khan/github-actions for changes to .gitattributes, action.yml, package.json, yarn.lock, dist/index.js, setup-files/gerald-pr.yml, setup-files/gerald-push.yml, .github/workflows/build.yml, .github/workflows/gerald-pr.yml, .github/workflows/gerald-push.yml, .github/workflows/pr-actions.yml, .github/workflows/pr-autofix.yml, .github/actions/setup/action.yml

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[somewhatabstract]

I need to modify the autofix-commit-action bit to use Node 20, or drop that and instead error if things need updating so that the dev just does it locally.

The other node16 warning we're getting is because Gerald is running itself against itself and the version it runs is the one on main which is, of course, not yet on Node 20. So that should go away when this PR lands.

[jeresig]

Great, thank you Jeff! You need to mark the .github/workflows directory as no-longer generated. I think you can change this in the .gitattributes file, this way the changes will show up in the PR.