ReplicatedPG: add osd_recover_clone_overlap_limit to limit clones

We don't want to clone_range from clones too many times.
For now, just skip the cloning if there are too many holes.

Fixes: #5985
Signed-off-by: Samuel Just <sam.just@inktank.com>
Reviewed-by: Sage Weil <sage@inktank.com>