All repository data is imported via the "image-builder" library, see https://github.com/osbuild/image-builder/tree/main/data/repositories

Most are imported via the "vendor" mechanism, but some special repositories are kept here, like the *-no-aux-key.json that is for rhel8 only and will only get installed on rhel10 (because the crypto policy on rhel10 does not allow the sha1 aux-key in the original rhel8 keys.

It also contains the centos-* -> centos-stream-* symlinks as go:embed does not support symlinks so we need to keep them externally.