LU-17941 ofd: do not copy over filter_fid structure

LU-17941 ofd: do not copy over filter_fid structure

When a bigger filter_fid has been writen on disk by newer server,
downgraded Lustre would read more data but we need store less to
fit smaller filter_fid structure.

Lustre-change: https://review.whamcloud.com/55408
Lustre-commit: TBD (from 587b178e9330fcdf58bdd3c093e72594a08a611a)

Fixes: 28c366cee6d ("LU-17218 ofd: improve filter_fid upgrade compatibility")
Signed-off-by: Bobi Jam <bobijam@whamcloud.com>
Change-Id: Idb5c8fffe4af22f35b64aa93e7efce7f9dd206d6
Reviewed-on: https://review.whamcloud.com/c/ex/lustre-release/+/55458
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Jian Yu <yujian@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>