selftests/damon/drgn_dump_damon_status: support failed region quota charge ratio

selftests/damon/drgn_dump_damon_status: support failed region quota charge ratio

Extend drgn_dump_damon_status.py to dump DAMON internal state for DAMOS
action failed regions quota charge ratio, to be able to show if the
internal state for the feature is working, with future DAMON selftests.

Link: https://lore.kernel.org/20260428013402.115171-11-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: Brendan Higgins <brendan.higgins@linux.dev>
Cc: David Hildenbrand <david@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>