Advance the lockstep Rust crate versions from `0.51.0` to `0.52.0` for
the next release.

<!-- spr-stack:start -->
**Stack**:
- ➡ #991

⚠️ *Part of a stack created by
[spr-multicommit](https://github.com/mattskl-openai/spr-multicommit). Do
not merge manually using the UI - doing so may have unexpected results.*
<!-- spr-stack:end -->