Bump grpcio from 1.47.0 to 1.48.0 in /test

Bumps [grpcio](https://github.com/grpc/grpc) from 1.47.0 to 1.48.0.
- [Release notes](https://github.com/grpc/grpc/releases)
- [Changelog](https://github.com/grpc/grpc/blob/master/doc/grpc_release_schedule.md)
- [Commits](grpc/grpc@v1.47.0...v1.48.0)

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

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

test/requirements.ci.txt

@@ -2,5 +2,5 @@ docker==5.0.3
 requests==2.28.1
 websocket-client==1.3.3
 urllib3==1.26.11
-grpcio==1.47.0
+grpcio==1.48.0
 protobuf==4.21.4