changefeed is not failed when snapTs is less than gcTs.

[asddongmen]

> ./cdc cli changefeed list
=== Command to ticdc(tiflow).
[
  {
    "id": "test",
    "namespace": "default",
    "summary": {
      "state": "warning",
      "tso": 455371655181500417,
      "checkpoint": "2025-01-17 17:10:07.864",
      "error": {
        "time": "2025-01-20T10:02:19.413492+08:00",
        "addr": "127.0.0.1:8301",
        "code": "CDC:ErrOwnerUnknown",
        "message": "snapTs 455371655181500417 is smaller than gcTs 455432575255052288"
      }
    }
  }
]

[wuhuizuo]

/type bug

cc @asddongmen

[purelind]

/type bug

[asddongmen]

fixed by #916