Bump prost from 0.7.0 to 0.8.0 (#9560)

Bumps [prost](https://github.com/tokio-rs/prost) from 0.7.0 to 0.8.0.
- [Release notes](https://github.com/tokio-rs/prost/releases)
- [Commits](https://github.com/tokio-rs/prost/compare/v0.7.0...v0.8.0

)

---
updated-dependencies:
- dependency-name: prost
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>