[CP] fix serialized packet and return less data

src/storage/tablet/ob_tablet_memtable_mgr.cpp

@@ -37,7 +37,7 @@ ObTabletMemtableMgr::ObTabletMemtableMgr()
     schema_recorder_()
 {
 #if defined(__x86_64__)
-  static_assert(sizeof(ObTabletMemtableMgr) <= 360, "The size of ObTabletMemtableMgr will affect the meta memory manager, and the necessity of adding new fields needs to be considered.");
+  static_assert(sizeof(ObTabletMemtableMgr) <= 352, "The size of ObTabletMemtableMgr will affect the meta memory manager, and the necessity of adding new fields needs to be considered.");
 #endif
 }