stop displaying rsync progress, and use git-annex's own progress display for local...

stop displaying rsync progress, and use git-annex's own progress display for local-to-local repo transfers

Reasons to do this include:

1. I've gotten pretty used to git-annex's own progress display, which is
   used for all transfers over ssh (except to old git-annex-shell),
   and for most special remote transfers. It's getting to seem weird to see
   the rsync progress display instead.
2. When -J was used, the rsync output could not be shown, and so there was
   no progress display. Now there will be.

Progress will also be displayed now when cp CoW is used. But I'd expect a CoW
copy to typically run so fast that the progress display will barely be
noticable.

This commit was sponsored by Peter on Patreon.