LU-17218 ofd: improve filter_fid upgrade compatibility

LU-17218 ofd: improve filter_fid upgrade compatibility

filter_fid could be expanded in later Lustre version, and with
upgrade then downgrade process, the filter_fid EA on disk
could has been expanded during upgrade, and won't work after
the downgrade.

This patch improves this process by allocating bigger buffer to
hold the expanded filter_fid EA then trims the unrecognizable
fileds off.

Lustre-change: https://review.whamcloud.com/52798
Lustre-commit: TBD (from cffd0a099c30794a63268da008958f722882119b)

Signed-off-by: Bobi Jam <bobijam@whamcloud.com>
Change-Id: I4c99f1d9f3962d46ebf9e9b799988ff3dba4f919
Reviewed-on: https://review.whamcloud.com/c/ex/lustre-release/+/53662
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>