Use `max_upload_size` as the limit when following the `Location` header

[S7evinK]

Otherwise we use the expected_size from the initial federation request, which might be far too low.

Pull Request Checklist

• [x] Pull request is based on the develop branch
• [x] Pull request includes a changelog file. The entry should:
  • Be a short description of your change which makes sense to users. "Fixed a bug that prevented receiving messages from other servers." instead of "Moved X method from EventStore to EventWorkerStore.".
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• [x] Code style is correct (run the linters)

[S7evinK]

Complement failing seems unrelated.

[erikjohnston]

Though a regression test would be good