[Java] Allow loading/unloading vectors without using FieldNodes

The information stored in FieldNode structure is not strictly necessary for serializing/deserializing vectors. We should allow loading/unloading of vectors without it.

**Reporter**: [Steven Phillips](https://issues.apache.org/jira/browse/ARROW-792) / @StevenMPhillips

_{**Note**: *This issue was originally created as [ARROW-792](https://issues.apache.org/jira/browse/ARROW-792). Please see the [migration documentation](https://github.com/apache/arrow/issues/14542) for further details.*}

首先追蹤參與序列化和反序列化的 Java 向量載入和卸載路徑，然後找出需要 FieldNode 資料的位置。當向量可以在不使用 FieldNode 結構的情況下載入和卸載，同時保留現有的序列化行為時，這項工作就完成了。

由索引模型根據 Issue 內容生成。