### What?
BREAKING CHANGE: Bump the minimum required Node.js version.
### Why?
Node.js 16 has reached end-of-life in September.
Bumped to `18.18.2` since it contained some security-related patches: https://nodejs.org/en/blog/vulnerability/october-2023-security-releases
### How?
Bumped `engines` where needed, upgraded the workflows.
This will allow us to remove quite a few polyfills, I'll open separate PRs for those.
As discussed with @feedthejim this breaks our E2E deploy tests workflow into it's own so it can be triggered on cron/manually easier.
One thing we'll need to consider with the cron/manual workflow is if a canary isn't published yet and Next.js relies on swc changes it will fail since this doesn't pack/publish a fresh built swc binary currently.
