LU-14926 utils: print unlink and setattr recs in llog_reader

LU-14926 utils: print unlink and setattr recs in llog_reader

Enhance llog_reader to print unlink and setattr llog records
correctly.

Lustre-change: https://review.whamcloud.com/44591
Lustre-commit: 80447caf980699fd1b0118e8f7c11e48aead04ce

HPE-bug-id: LUS-10220
Signed-off-by: Alexander Zarochentsev <alexander.zarochentsev@hpe.com>
Change-Id: I7b44f65c976459d143521185a807939524f67fa2
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Alexander Boyko <alexander.boyko@hpe.com>
Reviewed-by: Andrew Perepechko <andrew.perepechko@hpe.com>
Signed-off-by: Etienne AUJAMES <eaujames@ddn.com>
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/48306
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>