mm/damon/vaddr: add vaddr versions of migrate_{hot,cold}

migrate_{hot,cold} are paddr schemes that are used to migrate hot/cold
data to a specified node.  However, these schemes are only available when
doing physical address monitoring.  This patch adds an implementation for
them virtual address monitoring as well.

Link: https://lkml.kernel.org/r/20250709005952.17776-10-bijan311@gmail.com


Co-developed-by: Ravi Shankar Jonnalagadda <ravis.opensrc@micron.com>
Signed-off-by: Ravi Shankar Jonnalagadda <ravis.opensrc@micron.com>
Signed-off-by: Bijan Tabatabai <bijantabatab@micron.com>
Reviewed-by: SeongJae Park <sj@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>