Bump grpcio-tools from 1.50.0 to 1.51.1 (#465)

Bumps [grpcio-tools](https://github.com/grpc/grpc) from 1.50.0 to 1.51.1.
- [Release notes](https://github.com/grpc/grpc/releases)
- [Changelog](https://github.com/grpc/grpc/blob/master/doc/grpc_release_schedule.md)
- [Commits](grpc/grpc@v1.50.0...v1.51.1)

---
updated-dependencies:
- dependency-name: grpcio-tools
  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>

Author: dependabot[bot]

test_requirements.txt

@@ -3,5 +3,5 @@
 protobuf==4.21.9
 pytest==7.2.1
 grpc-stubs==1.24.11
-grpcio-tools==1.50.0
+grpcio-tools==1.51.1
 types-protobuf==4.21.0.5