clone: explicitly push bookmarks when cloning from local to remote
We need to explicitly push all local bookmarks when doing the clone from a local
repo to a remote one through ssh. This will let us remove the manual export of
bookmarks in clone and rely on the official exchange in push and pull instead.
clone: copy `.hg/bookmarks` during copy clone
Now that the standard pull function includes bookmarks, we need to ensure that
a copy clone also copies the bookmarks. This will let us drop the manual bookmark
pulling done independently during a clone.