Bump grpcio-tools from 1.67.0 to 1.68.1

Bumps [grpcio-tools](https://github.com/grpc/grpc) from 1.67.0 to 1.68.1.
- [Release notes](https://github.com/grpc/grpc/releases)
- [Changelog](https://github.com/grpc/grpc/blob/master/doc/grpc_release_schedule.md)
- [Commits](grpc/grpc@v1.67.0...v1.68.1)

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

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

Author: dependabot[bot]

test_requirements.txt

@@ -4,5 +4,5 @@ protobuf==5.28.3
 pytest==8.3.3
 pytest-asyncio==0.24.0
 grpc-stubs==1.53.0.5
-grpcio-tools==1.67.0
+grpcio-tools==1.68.1
 types-protobuf==5.28.3.20241030