OSD: oldest_map and newest_map should be displayed directly

OSD: oldest_map and newest_map should be displayed directly

9215996586ba79302c07e5cf586ec2add1ac159e delete these,
ceph daemon osd.x status
when osd status is displayed, only superblock.maps (begin ~ len) can be seen.
this need calculate maps to get oldest_map/newest_map held by the current osd.
moreover, it cannot be simply calculate. need pay attention to the boundaries。
this is not very friendly.

Fixes: https://tracker.ceph.com/issues/63836
Signed-off-by: zhangjianwei2 <zhangjianwei2@cmss.chinamobile.com>