[Bug] 使用insertTablets插入，当MeasurementSchema 的TSDataType 是TSDataType.TEXT 时，不支持空值插入，指定了bitmap也不行

### Search before asking

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

### Version

1.1.0

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

1、构建Table schemas ,指定TSDataType 类型是TSDataType.TEXT
2、构造模拟数据插入空值
```java
if (containNull && i % 9 == 0) {
tablet.bitMaps[i].mark((int) row);
}else{
tablet.addValue(schemaList.get(i).getMeasurementId(),row,random.nextDouble()*1000+"");
}
```
3、插入 sessionPool.insertTablets(tabletMap, false); 报错
Exception in thread "main" java.lang.NullPointerException
at org.apache.iotdb.tsfile.write.record.Tablet.calOccupationOfOneColumn(Tablet.java:341)

### What did you expect to see?

希望正常入库

### What did you see instead?

Exception in thread "main" java.lang.NullPointerException
at org.apache.iotdb.tsfile.write.record.Tablet.calOccupationOfOneColumn(Tablet.java:341)
source code: Tablet l ine:252
for(int rowIndex = 0; rowIndex < this.rowSize; ++rowIndex) {
valueOccupation += ### binaries[rowIndex].getLength();
}

### Anything else?

_No response_

### Are you willing to submit a PR?

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

Start with Tablet.calOccupationOfOneColumn around Tablet.java line 341, then reproduce the issue using a TEXT MeasurementSchema, a null value marked in the bitmap, and sessionPool.insertTablets. Trace the access to binaries[rowIndex].getLength(); done means the tablet is inserted successfully without a NullPointerException for null TEXT values.

Written by the indexing model from the issue text.