LU-14980 osd: check for locks in osd_trans_start()

LU-14980 osd: check for locks in osd_trans_start()

since LU-10048 we shouldn't be starting a transaction with
object (osd) locks held.

Signed-off-by: Alex Zhuravlev <bzzz@whamcloud.com>
Change-Id: Ia7d1de9351a23f8e0de52f3d5d0948f1e65529e7
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/44822
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>
Reviewed-by: Mikhail Pershin <mpershin@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>