xfs_scrub: selectively re-run bulkstat after re-running inumbers

xfs_scrub: selectively re-run bulkstat after re-running inumbers

In the phase 3 inode scan, don't bother retrying the inumbers ->
bulkstat conversion unless inumbers returns the same startino and there
are allocated inodes.  If inumbers returns data for a totally different
inobt record, that means the whole inode chunk was freed.

Cc: <linux-xfs@vger.kernel.org> # v5.18.0
Fixes: 245c72a6eeb720 ("xfs_scrub: balance inode chunk scan across CPUs")
Signed-off-by: "Darrick J. Wong" <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>