Bump the load-gen-gradle-deps group in /load-generator with 3 updates (…

…#1506)

Bumps the load-gen-gradle-deps group in /load-generator with 3 updates: [io.grpc:grpc-bom](https://github.com/grpc/grpc-java), [io.grpc:grpc-api](https://github.com/grpc/grpc-java) and [io.grpc:grpc-netty-shaded](https://github.com/grpc/grpc-java).


Updates `io.grpc:grpc-bom` from 1.59.0 to 1.59.1
- [Release notes](https://github.com/grpc/grpc-java/releases)
- [Commits](grpc/grpc-java@v1.59.0...v1.59.1)

Updates `io.grpc:grpc-api` from 1.59.0 to 1.59.1
- [Release notes](https://github.com/grpc/grpc-java/releases)
- [Commits](grpc/grpc-java@v1.59.0...v1.59.1)

Updates `io.grpc:grpc-netty-shaded` from 1.59.0 to 1.59.1
- [Release notes](https://github.com/grpc/grpc-java/releases)
- [Commits](grpc/grpc-java@v1.59.0...v1.59.1)

---
updated-dependencies:
- dependency-name: io.grpc:grpc-bom
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: load-gen-gradle-deps
- dependency-name: io.grpc:grpc-api
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: load-gen-gradle-deps
- dependency-name: io.grpc:grpc-netty-shaded
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: load-gen-gradle-deps
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>