存算分离compaction task异常，无法本地缓存数据

[xiongmao]

Starrocks版本3.4.2,对tablet compaction时，没有将tablet数据缓存DataCache，反复向对象存储拉取文件，compaction速度极慢。tablet是千列宽表数据。

同一分区下的tablet数据大小为1G：

1. 符合预期的compaction

I20250424 16:20:15.355299 139734746736384 vertical_compaction_task.cpp:99] Vertical compaction finished. tablet: 3180477, txn_id: 1198993, statistics: {"read_local_sec":7,"read_local_mb":1025,"read_remote_sec":0,"read_remote_mb":0,"read_remote_count":0,"read_local_count":1991404,"segment_init_sec":40,"column_iterator_init_sec":36,"in_queue_sec":1,"pk_sst_merge_sec":0}

2. 异常compaction 行为
   CN重启后，异常行为的tablet仍然保持异常。但是DataCache只有15%