Files opened by ParquetFileWriter’s appendFile method should to be closed correctly

I try to use the `appendFile` method of `ParquetFileWriter` to merge some smaller Parquet files into one large parquet file. After I finished the merge, I tried deleting the smaller files, but couldn't actually delete them.

After reading the ParquetFileWriter source code, I found that the file he opened was not closed in the end method, which seemed unreasonable.

When testing on `Windows`, it was found that these implicitly opened files cannot be deleted or renamed. This seems to be related to Windows file handles. But it's worked fine on macOS.

Anyway, I will submit a patch to ensure that files opened through the appendFile function are closed correctly.

**Reporter**: [Deng An](https://issues.apache.org/jira/secure/ViewProfile.jspa?name=packyan)
#### PRs and other links:
- [GitHub Pull Request #1351](https://github.com/apache/parquet-java/pull/1351)
- [GitHub Pull Request #1351](https://github.com/apache/parquet-mr/pull/1351)

_{**Note**: *This issue was originally created as [PARQUET-2477](https://issues.apache.org/jira/browse/PARQUET-2477). Please see the [migration documentation](https://issues.apache.org/jira/browse/PARQUET-2502) for further details.*}

从 issue 中确定的 ParquetFileWriter.appendFile 及其 end 方法开始。在 Windows 上重现 merge，并验证完成后是否可以删除或重命名较小的 Parquet 文件；链接的 pull request 表明相关工作已经在进行中。

由索引模型根据 Issue 内容生成。