LU-16873 osd: update OI_Scrub file with new magic

LU-16873 osd: update OI_Scrub file with new magic

The fix for LUS-11542 detects the format change correctly
but does not write new oi scrub file magic, so new mount
triggers the "oi files counter reset" again and again.

Fixes: 126275ba83 ("LU-16655 scrub: upgrade scrub_file from 2.12 format")
HPE-bug-id: LUS-11646
Signed-off-by: Alexander Zarochentsev <alexander.zarochentsev@hpe.com>
Change-Id: Ia13fcfaf0d8f2c4ee9331dd9fec0ff159d195186
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/51226
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Andrew Perepechko <andrew.perepechko@hpe.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>