xfstest: fix filtering in 206 for ftype and projid32bit

xfstest: fix filtering in 206 for ftype and projid32bit

xfs/206 displays the output for mkfs.xfs, xfs_growfs and xfs_info.
Change the filtering to hide the new output for the field type
feature.

While cleaning up the ftype output, also clean up the projid32bit
output in xfs_growfs and xfs_info.

Signed-off-by: Mark Tinguely <tinguely@sgi.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Rich Johnston <rjohnston@sgi.com>