Closes NEXT-397
Resolve `metadata` and `generateMetadata()` exports along with head
during rendering, this is the easy way for now to collect all the
metadata properly. Since we can access segment params and search params
only in rendering, so I moved all the resolving logic from loader to
render process.
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## Feature
- [x] Implements an existing feature request or RFC. Make sure the
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- [ ] Related issues linked using `fixes #number`
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tests added
- [ ] Documentation added
- [ ] Telemetry added. In case of a feature if it's used or not.
- [ ] Errors have a helpful link attached, see
[`contributing.md`](https://github.com/vercel/next.js/blob/canary/contributing.md)
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Co-authored-by: Tim Neutkens <tim@timneutkens.nl>
a1c04b0162