generic/158,304: filter dedupe error message

generic/158,304: filter dedupe error message

Kernel commit 22725ce4e4a0 ("vfs: fix isize/pos/len checks for reflink &
dedupe") added more checks on reflink and dedupe, rejected dedupe past
EOF early and explicitly, and causes generic/158 and generic/304 to fail.

  Try dedupe from past EOF
 -dedupe: Invalid argument
 +XFS_IOC_FILE_EXTENT_SAME: Invalid argument
  Try dedupe to past EOF, destination offset beyond EOF

Also there's an xfsprogs patch from Darrick ("xfs_io: prefix dedupe
command error messages consistently") to change all xfs_io dedupe
error message prefixes to "XFS_IOC_FILE_EXTENT_SAME".

So introduce a new _filter_dedupe_error, change all "dedupe" prefix
to XFS_IOC_FILE_EXTENT_SAME, make tests pass with both old/new
kernel & userspace.

Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Eryu Guan <eguan@redhat.com>