Bump grpcio-tools from 1.68.1 to 1.70.0

Bumps [grpcio-tools](https://github.com/grpc/grpc) from 1.68.1 to 1.70.0.
- [Release notes](https://github.com/grpc/grpc/releases)
- [Changelog](https://github.com/grpc/grpc/blob/master/doc/grpc_release_schedule.md)
- [Commits](grpc/grpc@v1.68.1...v1.70.0)

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

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

Author: dependabot[bot]

dev_requirements.txt

@@ -10,7 +10,7 @@ pytest
 pytest-mock
 pytest-timeout
 freezegun
-grpcio-tools==1.68.1
+grpcio-tools==1.70.0
 mypy-protobuf
 protoletariat
 types-Pygments