ActiveStorage with GCS service add cache-control

[Quoc-Anh Nguyen]

What do you think about adding the cache-control option to GCS service (as same as S3 service)?

In Gcloud API docs: https://googleapis.dev/ruby/google-cloud-storage/latest/Google/Cloud/Storage/Bucket.html#create_file-instance_method

The current code on S3: https://github.com/rails/rails/blob/6-0-stable/activestorage/lib/active_storage/service/s3_service.rb#L16