xfs: skip filestreams tests on internal RT devices

xfs: skip filestreams tests on internal RT devices

The filestreams tests using _test_streams force a run on the data
section, but for internal RT zoned devices the data section can be tiny
and might not provide enough space.  Skip these tests as they aren't
really useful when testing a zoned config anyway.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Zorro Lang <zlang@kernel.org>