Bump grpcio-tools from 1.51.1 to 1.51.3 in /test/environment/grpc

Bumps [grpcio-tools](https://grpc.io) from 1.51.1 to 1.51.3.

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

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

test/environment/grpc/requirements.txt

@@ -1,4 +1,4 @@
-grpcio-tools==1.51.1
+grpcio-tools==1.51.3
 grpcio==1.51.3
 grpcio-reflection==1.51.3
 grpcio-health-checking==1.51.1