The page compressedSize printed by the ShowPagesCommand is actually uncompressedSize

It seems that the data page obtained by calling PageReader.readPage() (L122 in ShowPagesCommand) is decompressed, and the bytes obtained by DataPageV1 is decompressed.

**Reporter**: [Yujiang Zhong](https://issues.apache.org/jira/secure/ViewProfile.jspa?name=zhongyuj) / @zhongyujiang
#### Original Issue Attachments:
- [59fa778d-d870-49f2-87f7-046e2e87ef9f.jpeg](https://issues.apache.org/jira/secure/attachment/13066545/59fa778d-d870-49f2-87f7-046e2e87ef9f.jpeg)
- [image-2024-02-07-16-48-08-016.png](https://issues.apache.org/jira/secure/attachment/13066544/image-2024-02-07-16-48-08-016.png)

_{**Note**: *This issue was originally created as [PARQUET-2427](https://issues.apache.org/jira/browse/PARQUET-2427). Please see the [migration documentation](https://issues.apache.org/jira/browse/PARQUET-2502) for further details.*}