LU-16536 osp: don't cleanup ldlm in precleanup phase

LU-16536 osp: don't cleanup ldlm in precleanup phase

instead do this in cleanup phase so that all OSPs have chance
to abort in-flight RPCs which can block MDT thread holding
LDLM locks.

Fixes: 226fd401f9 ("LU-7660 dne: support fs default stripe")
Signed-off-by: Alex Zhuravlev <bzzz@whamcloud.com>
Change-Id: Ib3714b29c514a7fa938d47717dc36525654407d6
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/49925
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Lai Siyao <lai.siyao@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>