Bump tonic-build from 0.9.2 to 0.12.1

Bumps [tonic-build](https://github.com/hyperium/tonic) from 0.9.2 to 0.12.1.
- [Release notes](https://github.com/hyperium/tonic/releases)
- [Changelog](https://github.com/hyperium/tonic/blob/master/CHANGELOG.md)
- [Commits](hyperium/tonic@v0.9.2...v0.12.1)

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

Signed-off-by: dependabot[bot] <support@github.com>

crates/ext-processor/Cargo.toml

@@ -40,7 +40,7 @@ sfv = "0.9.2"
 redis-test = { workspace = true }
 
 [build-dependencies]
-tonic-build = "0.9.2"
+tonic-build = "0.12.1"
 
 [lib]
 # Disable doctests for this crate because we can't easily disable them only for generated files.