Add support for buildPython version 3.13

[mhsmith]

Checklist in product/gradle-plugin/README.md.

Based on past experience, the biggest risk is compatibility with our bundled pip and its vendored dependencies.

[Jzhenli]

will support to disable GIL? @mhsmith

[mhsmith]

No, we'll follow the default setting, which means the GIL will still be present in 3.13.