test: add app route og image with custom font case (#68798)
Add test for Node.js and Edge runtime for og image rendering with custom
font, they should not error.
This is the manual setup approach for [metadata route with custom
routes](https://github.com/vercel/next.js/blob/canary/test/e2e/app-dir/metadata-dynamic-routes/app/font/opengraph-image.tsx)
