Integrate config/yt-202-make-mirror-generation-robust-agains-upstream-changes-dunfell

Commit: config@9a456c35

YT-202 There is a mirror with tarballs for repos used during the Yocto build if some unnecessary changes occur on upstream upstream repo, it fetches and recreates the tarball on the mirror, what may affect the build. Reconfigure the mirror sync so that if changes on the upstream lead to creating a new tarball, the old copy is stored in the archive directory.

Add archive MIRROR into the configuration.