Request to extract the whole point cloud from a VoxelBlockGrid, not just the isosurface one

[vicarios]

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Checklist

• [X] I have searched for similar issues.
• [X] For Python issues, I have tested with the latest development wheel.
• [X] I have checked the release documentation and the latest documentation (for master branch).

Proposed new feature or change

At the moment the open3d::t::geometry::VoxelBlockGrid::ExtractPointCloud function allows you to extract only the isosurface point cloud.Is it possible to extract the entire point cloud up to the truncation distance?

References

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Additional information

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