Add initial support for objstore preload bundles

When performing initial cloning of large repository collections that
contain a lot of forks, we end up spending a lot of time waiting
objstore operations. If we are able to preload objestore repositories
from the mirror we're cloning from, then we can avoid a lot of
unnecessary disk churn.

Signed-off-by: Konstantin Ryabitsev <konstantin@linuxfoundation.org>
4 files changed