xfs: skip tests that rely on allocation behaviors of the data device

xfs: skip tests that rely on allocation behaviors of the data device

A large number of xfs-specific tests rely on specific behaviors of the
data device allocator, such as fragmenting free space, carefully curated
inode and free space counts, or features like filestreams that only
exist on the data device.

These tests fail horribly if the test runner specified rtinherit=1 on
the mkfs command line, so skip them all.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Zorro Lang <zlang@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Eryu Guan <guaneryu@gmail.com>