[Bug] The CAST operator has a logical error causing precision loss when converting floating-point values.

### Search before asking

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

### Version

version 1.3.3 (Build: ad95a7e)

### Describe the bug and provide the minimal reproduce step

```
DROP DATABASE root.db0
CREATE DATABASE root.db0

CREATE TIMESERIES root.db0.t1 WITH datatype=FLOAT compressor=GZIP 'MAX_POINT_NUMBER'='6';
INSERT INTO root.db0(timestamp, t1) VALUES (1643027794590, 0.5522);
INSERT INTO root.db0(timestamp, t1) VALUES (1643027794600, 0.8044);

# query 1
select t1 from root.db0 where t1 <= 0.8044

# query 2
select t1 from root.db0 where cast(t1 as float) <= 0.8044
```

### What did you expect to see?

Query 1 returned result set: 0.5522 and 0.8044

Query 2 returned result set: 0.5522 and 0.8044

### What did you see instead?

Query 1 returned result set: 0.5522 and 0.8044

Query 2 returned result set: 0.5522

### Anything else?

Dear IoTDB team, When using the CAST operator to convert a FLOAT value to FLOAT, the value theoretically should remain unchanged. However, the above test case indicates that a logical error causing precision loss occurs after the CAST conversion.

### Are you willing to submit a PR?

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

Führe die SQL-Reproduktion aus dem Issue gegen IoTDB 1.3.3 aus und vergleiche die beiden Abfrageergebnisse. Verfolge die Verarbeitung des CAST-Ausdrucks und den FLOAT-Vergleichspfad. Überprüfe anschließend, dass das Casten von FLOAT zu FLOAT den Wert unverändert erhält und dass beide erwarteten Zeilen zurückgegeben werden.

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