TieringService will stuck when drop the table that is tiering

### Search before asking

- [x] I searched in the [issues](https://github.com/apache/fluss/issues) and found nothing similar.

### Description

1: tiering service start to tiering this table
2: user drop the table
3: the scanner won't fail and log warning forever:
```
Received unknown table or bucket error in fetch for bucket TableBucket{tableId=29, bucket=0}
```

The coordinator server should tell the tiering service that the table is tiering is dropped via heartbeat so that it can cancle the tiering for this table

### Willingness to contribute

- [ ] I'm willing to submit a PR!