This ensures non-matching API routes can be rewritten with i18n configured as currently we bail and render the 404 page when a locale prefixed API route is requested.
## Bug
- [x] Related issues linked using `fixes #number`
- [x] Integration tests added
- [ ] Errors have helpful link attached, see `contributing.md`
x-ref: [slack thread](https://vercel.slack.com/archives/CGU8HUTUH/p1643930049224689)
closes: https://github.com/vercel/next.js/issues/28921