UV_USE_IO_URING does not update file handle position

I suspect possible regression. Not sure what version but must have been recent:

await stream.promises.pipeline(src, fs.createWriteStream(dstPath))

Will not create a full sized file. I suspect that since createWriteStream doesn't explicitly set position during writes it expects the file handle position to be properly updated, which does not seem to be the case with URING.

首先，在启用 UV_USE_IO_URING 的情况下复现 stream.promises.pipeline 示例，并将生成的文件大小与预期大小进行比较。跟踪 fs.createWriteStream 如何在未指定显式位置的情况下执行写入，并验证文件句柄位置是否正确推进。完成标准是 pipeline 创建出完整文件，并保持预期的句柄位置。