mm/damon/sysfs-schemes: add files for setting damos_filter->sz_range

Add min and max files for damon filters to let the userspace decide the
min/max folio size to operate on.  This will be needed to decide what
folio sizes to give pa_stat for.

Link: https://lkml.kernel.org/r/20250211124437.278873-3-usamaarif642@gmail.com


Signed-off-by: Usama Arif <usamaarif642@gmail.com>
Reviewed-by: SeongJae Park <sj@kernel.org>
Cc: David Hildenbrand <david@redhat.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>