Bump grpcio-tools from 1.58.0 to 1.59.0 in /test/environment/grpc

Bumps [grpcio-tools](https://github.com/grpc/grpc) from 1.58.0 to 1.59.0.
- [Release notes](https://github.com/grpc/grpc/releases)
- [Changelog](https://github.com/grpc/grpc/blob/master/doc/grpc_release_schedule.md)
- [Commits](grpc/grpc@v1.58.0...v1.59.0)

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

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

test/environment/grpc/requirements.txt

@@ -2,4 +2,4 @@ grpcio==1.59.0
 grpcio-health-checking==1.59.0
 grpcio-reflection==1.59.0
 grpcio-testing==1.58.0
-grpcio-tools==1.58.0
+grpcio-tools==1.59.0