Fix @opentelemetry/api aliasing for webpack (#64085)
Next creates an alias for `@opentelemetry/api` to a prebundled version
[here](https://github.com/vercel/next.js/blob/a9f85d14c0187a0a3dd08468bcb9d2be3cb4be40/packages/next/src/build/create-compiler-aliases.ts#L108-L110).
However, there's a bug in `hasExternalOtelApiPackage` - it currently
always fails to remove `@opentelemetry/api/package.json` because it's
not one of the exports.
