LU-18959 ofd: remove sync_on_lock_cancel tunable

LU-18959 ofd: remove sync_on_lock_cancel tunable

Now that enough time passed we don't need anymore

Revert "LU-12967 ofd: restore sync_on_lock_cancel tunable"

This reverts commit 7df7347b7b188e7168e094304fd6d2d985f7f274.

Except the sanity.sh portion

Test-Parameters: trivial
Signed-off-by: Oleg Drokin <green@whamcloud.com>
Change-Id: I871ea7ba90bb2f193c967cdd184bbf392916b525
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/59145
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>