libmount: add option to override fs-type with mount-type

libmount: add option to override fs-type with mount-type

This patch introduces an internal libmount method to convert fs-type
(as provided by libblkid or udevd) to mount-type to specify a different
mount driver.

Currently, the mapping from fs-type to mount-type is hardcoded in
libmount as a temporary solution. The final implementation should
provide configuration files (e.g., /etc/mount/fs.d/<name>) for these
mappings.

The current default mapping is implemented only for NTFS. It can be
modified during compilation with:

 ./configure --with-ntfs-mounttype=TYPE
or
 meson setup build -D ntfs-mounttype=TYPE

The default is "ntfs3".

Addresses: https://github.com/util-linux/util-linux/pull/3618
Addresses: https://github.com/systemd/systemd/pull/39982
Signed-off-by: Karel Zak <kzak@redhat.com>