chore(bazel): [gsuite-addons] update protobuf to v3.21.7 (#8549)

PiperOrigin-RevId: 477955264

Source-Link: https://togithub.com/googleapis/googleapis/commit/a724450af76d0001f23602684c49cd6a4b3a5654

Source-Link: https://togithub.com/googleapis/googleapis-gen/commit/4abcbcaec855e74a0b22a4988cf9e0eb61a83094


This OwlBot-looking pull request was manually created by:

```
suztomo@suztomo:/tmp$ git clone https://togithub.com/googleapis/google-cloud-java
suztomo@suztomo:/tmp$ git clone https://togithub.com/googleapis/googleapis-gen
suztomo@suztomo:/tmp$ cd google-cloud-java
suztomo@suztomo:/tmp/google-cloud-java$ module=java-gsuite-addons
suztomo@suztomo:/tmp/google-cloud-java$ GOOGLEAPIS_DIR=/tmp/googleapis-gen
suztomo@suztomo:/tmp/google-cloud-java$  docker run --rm --user "$(id -u):$(id -g)" \
        -v "$(pwd):/repo" \
        -v "${GOOGLEAPIS_DIR}:/googleapis-gen" \
        -w /repo \
        --env HOME=/tmp \
        gcr.io/cloud-devrel-public-resources/owlbot-cli:latest copy-code \
        --source-repo=/googleapis-gen \
        --config-file=${module}/.OwlBot.yaml
suztomo@suztomo:/tmp/google-cloud-java$ docker run --rm --user "$(id -u):$(id -g)" \
        -v "$(pwd):/workspace"   -w /workspace \
        --env HOME=/tmp \
        gcr.io/cloud-devrel-public-resources/owlbot-java
suztomo@suztomo:/tmp/google-cloud-java$ git commit -a
```