LU-13195 osp: track destroyed OSP object

LU-13195 osp: track destroyed OSP object

retain destroyed OSP objects in memory to prevent races when
in-flight destroyed is passed by read or attr_get leading to
incorrect local states.
also block operations to such an object with -ENOENT.

Signed-off-by: Alex Zhuravlev <bzzz@whamcloud.com>
Change-Id: Ied59f1a95458e8890249b92d4efc38e258a7e3cf
Reviewed-on: https://review.whamcloud.com/38385
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Alexander Boyko <alexander.boyko@hpe.com>
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>