[BugFix] Fix shutdown tablet can not gc (#63595)

Signed-off-by: sevev <qiangzh95@gmail.com>

be/src/storage/tablet_manager.cpp

@@ -447,6 +447,7 @@ Status TabletManager::drop_tablet(TTabletId tablet_id, TabletDropFlag flag) {
             // to 'RUNNING' from 'SHUTDOWN'.
             std::unique_lock l(dropped_tablet->get_header_lock());
             (void)dropped_tablet->set_tablet_state(TABLET_SHUTDOWN);
+            dropped_tablet->save_meta();
         }
 
         // Remove the tablet directory in background to avoid holding the lock of tablet map shard for long.