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，透過 pyarrow.read_table(read_dictionary=string_columns) 後執行 table.append(df) 來重現此失敗。檢查對 Dictionary (Int32, Utf8) 陣列的 bucket transform 處理；當使用 Dictionary 編碼的欄位可以追加而不會出現 unsupported-data-type error 時，即表示完成。

由索引模型根據 Issue 內容生成。