Precompiled 2024-07-18-26665f2

remove generated_ids from transaction writes (#28033)

`generated_ids` are redundant because they're also represented as the keys in `updates` where `update.old_document.is_none()`.

delete the field. reconstruct it when we need to check generated IDs at commit time, and when constructing the proto for funrun to avoid version skew issues.

GitOrigin-RevId: 510e856a94ca14a106351a001d29d1b0e5555c95