libblkid/libmount: ntfs: return filesystem type 'ntfs3'

libblkid/libmount: ntfs: return filesystem type 'ntfs3'

Change the returned filesystem type from 'ntfs' to 'ntfs3', to match
what the kernel/fs/ntfs3 driver calls register_filesystem on [1][2].
This same driver also registers itself as 'ntfs', but then runs in a
"legacy" mode [3] which forces the mount to stay RO.

Link: [1]: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/fs/ntfs3/super.c?h=v6.12#n1794
Link: [2]: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/fs/ntfs3/super.c?h=v6.12#n1874
Link: [3]: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/fs/ntfs3/super.c?h=v6.12#n412
Signed-off-by: Johannes Schneider <johannes.schneider@leica-geosystems.com>