Fix attachments not displaying inline with Google Cloud Storage

There were several issues:

1. With Google Cloud Storage, we can't override the Content-Type with
Response-Content-Type once it is set.  Setting the value to
`application/octet-stream` doesn't buy us anything. GCS defaults to
`application/octet-stream`, and AWS uses `binary/octet-stream`. Just remove
this `Content-Type` when we upload new files.

2. CarrierWave and fog-google need to support query parameters:
https://github.com/fog/fog-google/pull/409/files, https://github.com/carrierwaveuploader/carrierwave/pull/2332/files.
CarrierWave has been monkey-patched until an official release.

3. Workhorse also needs to remove the Content-Type header in the request
(https://gitlab.com/gitlab-org/gitlab-workhorse/blob/ef80978ff89e628c8eeb66556720e30587d3deb6/internal/objectstore/object.go#L66),
or we'll get a 403 error when uploading due to signed URLs not matching the headers.
Upgrading to Workhorse 6.1.0 for https://gitlab.com/gitlab-org/gitlab-workhorse/merge_requests/297
will make Workhorse use the headers that are used by Rails.

Closes #49957

1 files changed, 1 insertions, 1 deletions

diff --git a/spec/lib/object_storage/direct_upload_spec.rb b/spec/lib/object_storage/direct_upload_spec.rb
index 632acd6eb46..9c308cc1be9 100644
--- a/spec/lib/object_storage/direct_upload_spec.rb
+++ b/spec/lib/object_storage/direct_upload_spec.rb
@@ -62,7 +62,7 @@ describe ObjectStorage::DirectUpload do
         expect(subject[:StoreURL]).to start_with(storage_url)
         expect(subject[:DeleteURL]).to start_with(storage_url)
         expect(subject[:CustomPutHeaders]).to be_truthy
-        expect(subject[:PutHeaders]).to eq({ 'Content-Type' => 'application/octet-stream' })
+        expect(subject[:PutHeaders]).to eq({})
       end
     end