BucketTransform fails on dictionary-encoded pyArrow arrays

### Apache Iceberg version

0.9.1

### Please describe the bug 🐞

Pyiceberg version - 0.9.1 (also reproduced with 0,11.1)
Pyiceberg core version - 0.9.1

table created with bucket transform

df = pyarrow.read_table(read_dictionary=string_columns)

table.append(df)

ValueError : Feature Unsupported => Unsupported data type for bucket transform: Dictionary (Int32, Utf8)

### Willingness to contribute

- [ ] I can contribute a fix for this bug independently
- [ ] I would be willing to contribute a fix for this bug with guidance from the Iceberg community
- [x] I cannot contribute a fix for this bug at this time

使用 bucket transform，通过 pyarrow.read_table(read_dictionary=string_columns) 后执行 table.append(df) 来复现该失败。检查对 Dictionary (Int32, Utf8) 数组的 bucket transform 处理；当使用 Dictionary 编码的列可以追加而不会出现 unsupported-data-type error 时，即表示完成。

由索引模型根据 Issue 内容生成。