Migration from 1.3.1 to 2.0.1 breaks public permissions with Google Cloud Storage

[nerf-qh]

After migration from 1.3.1 to 2.0.1 public permissions per object get
ruby 2.6.4
carrierwave 2.0.1
fog-core 2.1.0
fog-google 1.9.1

example
https://github.com/nerf-qh/carrierwave_update

Config

creds = {
  provider: 'Google',
  google_project: ENV['GCS_PROJECT'],
  google_json_key_string: ENV['GCS_AUTH']
}

CarrierWave.configure do |config|
  config.fog_credentials = creds
  config.fog_directory  = ENV['GCS_BUCKET']
  config.fog_public     = true
  config.storage = :fog
end

The initial file is public, but in the copy_to method this option is lost
https://github.com/carrierwaveuploader/carrierwave/blob/master/lib/carrierwave/storage/fog.rb#L444-L446

The same happens if you just copy files
https://gist.github.com/nerf-qh/2606513f42e3be169e52cac4ca72f5ce

[yosiat]

Getting the same issue, when upgrading carrierwave.

We noticed the difference is that:

• old carrierwave gave this ACL:

  {
    "entity": "allUsers",
    "role": "READER"
  }

• new carrierwave don't give this ACL and this is the only reader role it gives (replaced values):

  {
    "entity": "XXXXX",
    "projectTeam": {
      "projectNumber": "XXXXX",
      "team": "viewers"
    },
    "role": "READER"
  },

This is a major issue when upgrading carrierwave.

[yosiat]

Did investigation of the issue and as written here it happens because of copy_object (which I think happens because of - #2136)

I opened an issue to ask fog-google on how to pass auth query parameters so we can pass it from carrierwave - fog/fog-google#505