If the client opts in to "recomputeBoundingBoxes", then we manually
compute a bounding box that ignores the glTF min / max annotations.
This computation was erroneously including the transform of the injected
root node, which is not part of the model.
This could cause a problem when creating the asset, then immediately
positioning it with its injected root node before the ResourceLoader
is done downloading vertex buffers.
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